Cab & body

A/C & heat

Order the Vintage Air Gen 5 SureFit 945619. It is the Big Block, long water pump, factory-air kit, about $2,330-2,400 at Lutty's, SW Classics and H&H, and it includes the compressor, BBC engine brackets, condenser, preformed lines and drier. Do not also buy an Old Air bracket or separate SD508; those are only for…

Prices below were checked 2026-10-12 from vendor search snippets and fetched manufacturer pages. Summit and Jegs product pages could not be fetched, and CJ Pony Parts, Classic Industries and several forum pages returned 403 on direct fetch. For those, the price comes from a search-result snippet and says so. Anything not directly confirmed is marked "unconfirmed".

The pick

Good
$600-900 hybrid (factory box kept, Sanden 508 about $245-425, Old Air BBC bracket $126, condenser kit 021573 $358.99, hoses and drier), or the Brothers BT8000A complete kit at $2,049.95 (BBC fitment unconfirmed)
Better
Vintage Air Gen 5 SureFit 945619 at $2,330-2,400, which already includes the compressor and BBC brackets, about $2,500-2,700 all-in. The alternative is the Old Air Hurricane CAP-7412E-PS at $2,095 (BBC bracket fitment unconfirmed).
Best
Serpentine route, about $4,500-5,000 estimated: Vintage Air Front Runner BBC (174050BCA, about $2,670-2,700, also includes a water pump and alternator), SureFit evaporator kit and condenser kit 021573 ($358.99). The evaporator-kit price is unconfirmed. The other option is Classic Auto Air Smart Series CA203034F, from about $2,575 (BBC fitment unconfirmed).

For this truck, pick the Vintage Air Gen 5 SureFit 945619 (Big Block, long water pump, factory air), about $2,330 to $2,400. It already includes the Sanden-type compressor and BBC engine brackets, so do not also buy an Old Air bracket or a separate SD508 unless you go hybrid. Confirm water-pump length and the configuration options with the seller before ordering. Add an oversized parallel-flow condenser and a dedicated electric fan if the Cold Case radiator and fans leave the condenser starved of air.

Reasons:

  • Controls and blend. It has electronic blend and no vacuum, which the 1977 factory system depended on (vacuum pots and canisters are well known to leak after decades).
  • Refrigerant system is all new. The R-12 to R-134a conversion is not a question; every coil is R134a-spec.
  • Heater core is separate and the heat/defrost works. Defrost is dehumidified.
  • Support and parts. Vintage Air has a large dealer network, and parts will exist when Walter is driving the truck in 2042.
  • Cost. About $2,330 to $2,400 for the kit (compressor, brackets, condenser, lines and drier included), plus pulleys/belts, heater hose and refrigerant (roughly $100 to $300 total; estimate, unconfirmed). Custom or re-made hoses may still be needed for header clearance.

Case-by-case picks:

  • If the owner keeps the stock V-belt drive: the SureFit 945619 as ordered, budget about $2,500 to $2,700 total. The Old Air 40-116R/40-118R bracket ($126) and a Sanden 508 ($245 to $425) are for the hybrid or Hurricane-inside-package builds only; buying them on top of the SureFit would duplicate parts.
  • If the owner chooses serpentine: the Vintage Air Front Runner BBC kit (about $2,670 to $2,760 at Classic Industries/CJ, snippets) includes the Sanden SD7 compressor, but also a water pump, alternator and PS bracket, so it is mostly a drive-system purchase. Buy the SureFit evaporator (cab-side) kit plus the 021573 condenser kit ($358.99) rather than the full 945619, whose included V-belt compressor and brackets would be wasted. The SureFit evaporator-kit price was not confirmed, so the all-in figure (about $4,500 to $5,000) is an estimate. The decision belongs to the accessory-drive section, but it should drive the A/C choice.
  • If the owner wants maximum factory look (stock-appearing vents and a slide control): Old Air Hurricane CAP-7412E-PS at $2,095. It is cheaper and looks more stock than the SureFit. I found no owner reports on it for 1973-80 trucks, so its track record is unverified, and its BBC bracket fitment is unconfirmed (call Old Air).
  • Is factory rebuild realistic? Yes, for a purist, and forum opinion is roughly split. A forum technician's advice: "Don't waste time or money on parts replacement unless they have failed" [18], and other posters say a restored factory system keeps them comfortable on a 105F Texas day [17]. The Old Air Pro6TEN ($450 to $470, snippets) is a bolt-in R134a replacement for the A6 that reuses the original brackets and hoses, which makes the rebuild cheaper than the first draft implied. The rebuild bill still includes accumulator and service kit, hoses (the old rubber hoses should be replaced), possibly the evaporator, a new condenser, and the vacuum-controlled dash; the R4 compressor (1981+ trucks) has a bad reputation in the forums [20], but a 1977 uses the A6. The original poster in [17] chose a kit because the old parts were brittle, not because of cost. The main reason to keep the factory box is to keep the factory look, and it is a legitimate choice. For a decade-long build that turns into a 2042 daily driver, I would still lean toward the new system because of the dead-vacuum-control risk, but the call is closer than the first draft said. For a decade-long build that turns into a 2042 daily driver, I would take the new system.
  • Hybrid (factory box with Sanden 508, parallel-flow condenser, new drier and hoses) is the cheapest way to get working A/C: roughly $600 to $900 in parts. A moderator in [19] reports a Chevelle with a factory POA valve and R134a holding about 33F at the vent; that was a factory-style system, not a Sanden hybrid, and a different car. But then it relies on the original vacuum controls, which the owner will almost certainly want to replace.

Why it matters

This is a Kansas City truck. Summer there means 95F or more with heavy humidity. The owner's 35-minute interstate commute, with kid-hauling to follow in ~2042, makes the A/C a real system and not a trim item. The A/C has been dead since 2005, so every refrigerant-side part is suspect. The factory evaporator and heater case are 49 years old, and the foam seals and door linkage in those boxes are usually the real failure points. The cooling system also matters here. A big-block under a hood with a condenser in front of the radiator is the hard case for condenser airflow at stoplights.

The cabin side of the project (dash, vents, heater, defrost, controls) and the engine side (compressor, bracket, belts, hoses, condenser) come as one package. Both are shaped by two decisions in other sections: the accessory drive (stock V-belt vs. serpentine) and the radiator and fan setup (Cold Case plus electric fans). Which side the factory compressor is on is not verified for this truck: Old Air sells a Hurricane kit specifically for "1973-80 Chevy Truck w/ Factory AC and Compressor on Passenger Side" [4] and BBC brackets 40-116R / 40-118R for passenger side, but it also sells condenser kit 51-7380DS "for driver-side compressor" and Classic Industries lists a driver-side bracket for long-pump 396-454 C10s (search summaries), so both layouts exist in the aftermarket. Everything below assumes a passenger-side compressor on a Mark IV big block because the SureFit 945619 and the Old Air brackets are built that way; if the truck is driver-side, the bracket, hoses and condenser kit change (section 90 check #6). The recommended Front Runner's compressor position on a C10 is not documented in anything retrieved: get Vintage Air's install sheet before ordering.

The owner is comfortable with wiring and has all the tools, so the real labor is hose crimping (or buying pre-crimped hoses), the firewall, and the dash. Charging needs a vacuum pump and gauges, or a shop visit.

There are three realistic paths:

  1. Rebuild the factory system and convert to R134a. The original evaporator and heater box stay. The owner replaces the compressor, accumulator or drier, hoses, orifice or expansion parts, and seals.
  2. Modern bolt-in kit (SureFit, Hurricane, Brothers, Classic Auto Air). It replaces the box and the controls and adds a compressor, condenser and hose set, using the factory holes.
  3. Hybrid. Keep or refresh the factory box, but use a Sanden compressor, parallel-flow condenser and new hose set. Forum members who do this report good results [18][19].

I would not run R-12. Reclaimed R-12 is scarce and expensive. Search results quote anything from $15/lb to $100+/lb, so the price is unreliable [24]. Plan for R134a only.

Options

Complete under-dash and under-hood systems (73-80 truck, factory-A/C cab)

Tier Brand & model Part # Price (vendor, checked 2026-10-12) Link Notes
Good Brothers Trucks Complete A/C System, factory-A/C cab, 73-80 BT8000A $2,049.95 sale, MSRP $2,306.95 (CJ Pony Parts, search snippet) [1] Evaporator, compressor, condenser, drier, brackets, louvers, duct hose, preformed aluminum lines, hi/lo switch, harness, backlit 3-lever control. "Uses existing holes in dash and firewall, no fabrication." Compatible with R12 or R134a. This is a 3-lever manual panel, not electronic blend. Engine and compressor fitment for a BBC is unconfirmed; ask before ordering.
Good /Better Old Air Products Hurricane Complete System, 73-80 w/ factory AC, passenger-side compressor CAP-7412E-PS $2,095.00 (oldairproducts.com, fetched page) [4] Hurricane unit, firewall block-off plates, electronic slide control, electronic bypass heater valve, factory-louver adapters, duct hose, compressor and bracket, condenser, drier, hose kit, pressure switch. The page does not say which engines the bracket fits. Old Air separately sells BBC passenger-side mounts (40-116R, 40-118R), so BBC is likely supported. Confirm by phone. A separate Old Air kit, CAP-7312E, is for heater-only trucks.
Better Old Air Products inside package only (Hurricane unit, A/C-dash version) IP-7412E $1,395.00 (oldairproducts.com, fetched page) [5] Cab side only. Pair with your own condenser, compressor and hoses. Best fit for the hybrid approach.
Better Vintage Air Gen 5 SureFit, 73-80 Chevy/GMC truck, factory air. 945619 is the Big Block, LONG water pump, factory-AC version (Vintage Air number 8615; SW Classics SKU CVT73-945619-AIR) 945619 / VA945619 $2,399.95 (H&H Classic, fetched 2026-10-12); $2,400.00 (SW Classics, fetched); $2,330.00 (Lutty's Chevy, fetched, free shipping); $2,379.99 (CJ Pony Parts, snippet) [2][3][6][39] Includes the compressor and the engine brackets, condenser with brackets, preformed lines and drier, so no separate bracket or compressor is needed. Retailers (Lutty's) ask you to specify alternator location, belt style, electric-fan preference, engine, exhaust type, power-steering type and water-pump style at order, so confirm the BBC/long-pump configuration with the seller. A short-water-pump 73-80 variant was not found; call Vintage Air if the 454 has a short pump. Microprocessor control, no cables or vacuum. Separate copper heat core and aluminum evaporator. Includes a molded replacement glove box (reduced capacity) and flat steel firewall cover. Customer must supply pulleys, V-belts, heater hoses and refrigerant. (The H&H link in the original draft, i-23187379, is the non-factory-air 941619 kit, not this one.) Vintage Air warns the kit "may interfere with some OEM radios or in-dash speakers."
Better (older number) Vintage Air Gen IV SureFit, 73-80 944175 (Classic Industries lists this as "With Factory AC") price not confirmed; Gen 5 is the current line [7] The Gen IV number still appears in catalogs, but Gen 5 appears to have replaced it. Verify with Vintage Air before buying a Gen IV kit.
Best Classic Auto Air Smart Series, 73-80, factory-A/C cab CA203034F-V (non-LS, fits factory A/C; CJ Pony Parts). CA2030349 and C2030349F are the LS-swap versions, not for a 454 from $2,574.99 (CJ Pony Parts, snippet; not re-confirmed, CJ pages return 403) [8][40] Serviceable evaporator and coils, SPAL fans, ducting, wiring, Sanden compressor, hoses and hardlines, Bluetooth app compatibility. Search results say the kit comes in small-block or big-block versions; which exact part number is the BBC one is unconfirmed, ask CAA. Forum owners praise Classic's tech support [17]. BBC engine fitment is unconfirmed.

All prices are for kits with a bundled compressor and brackets. The Vintage Air 945619 is explicitly the Big Block / long water pump / factory-AC version. For Old Air, Brothers and Classic Auto Air the BBC bracket and hose fitment is unconfirmed; ask each vendor before ordering.

Compressor and bracket for a passenger-side Mark IV big block

Tier Brand & model Part # Price (vendor, checked 2026-10-12) Link Notes
Good OER AC4510B Sanden 508-style compressor, 2-groove V-belt clutch, black AC4510B $265.99 (OER product page, fetched 2026-10-12; the earlier $189.99 figure was stale) [9] 138 cc / 8.39 cu in, new not rebuilt. Cheapest reputable 508 clone. Quality varies; Sanden-branded SD5H14 or SD508 is safer.
Better Vintage Air Sanden SD508, double V-groove 048085 (chrome, Jegs listing 960-048085); 04808-VUA (standard 2-groove) / 04808-VUQ (polished 2-groove) $247.99 and $245.99 snippets are for 04808-VMA, which is a 7-groove serpentine pulley, so do not buy VMA for a V-belt truck; V-belt price not confirmed (Speedway/Jegs/CJ pages 403 or empty); chrome/polished listed $424.99 to $436.98 in snippets [10] 8.4 cu in (about 138 cc), 5-piston design, R134a compatible. Vintage Air lists 6,000 rpm max sustained (search result of Vintage Air University page; page itself 404'd on fetch). The earlier "154 cc, 7 pistons" figure was the SD7 spec and was wrong for the 508. Compressor shaft rpm equals engine rpm times the crank-to-compressor pulley ratio, so a 6,000 rpm engine can exceed the limit if the compressor pulley is smaller than the crank pulley.
Better Old Air Products Sanden 508-style, vertical O-ring, 3/4-inch groove 21-4515 (plain finish); 21-4510 and 21-4663 recommended for the mounts below $280.00 (21-4515, Old Air, fetched 2026-10-12) [11] Old Air specifies these compressors with its BBC brackets.
Better (only if NOT buying the full SureFit, which already includes brackets; use for hybrid or Hurricane-inside-package builds) Old Air BBC bracket, long water pump, passenger side, top mount 40-116R $126.00 (oldairproducts.com, fetched) [12] Bolts to the heads and the top water pump bosses. Uses the groove normally used by the alternator, and the reverse. Check the long vs. short water pump on your 454 (long pump is the usual 1973-80 big-block truck setup per Vintage Air and Old Air part splits, but confirm on the engine).
Better Old Air BBC bracket, short water pump, passenger "wide mount" 40-118R $126.00 (oldairproducts.com, fetched) [13] For short water pump engines. Intended for roomier engine bays and low hoods.
Best Vintage Air Front Runner serpentine kit, BBC, power steering, no pump, black 174050BCA (CJ) / 174060BCA $2,721.99 sale (Classic Industries, MSRP $2,994.99) and $2,759.99 (CJ Pony Parts) in the 2026-10-12 integration-pass search summaries; $2,666.99 / $2,699.99 in the earlier snippets of this section (planning range $2,670-$2,760); pages 403 on fetch [14] Complete serpentine drive: Sanden SD7 compressor, Stewart aluminum water pump, 140 A alternator (the latest search summary says a 170-amp single-wire hairpin alternator and a 7B10 compressor; confirm which), power-steering bracket and pulley, Dayco tensioner and belt. So most of the price is the whole drive, not A/C. A forum member ran a Vintage Air BBC Sanden bracket VA151370BCA with an SD5S14 on an '85 K30; side and fit for a 1977 are unconfirmed [33]. The earlier claim that 15133-VCB is a driver-side bracket was not verified and is removed.
Best (alt) March Performance Ultra Drive BBC serpentine kit, with power steering ACB19 from $2,613.99 (CJ Pony Parts, search result); without PS from $2,476.99 (ACB18) [15] Includes chrome Sanden 7176 compressor, 140 A alternator, reverse-rotation short water pump and GM Type 2 PS pump, so the water-pump length question goes away. Revolver kit (ACB28) is $2,295 with A/C.

Hoses and service parts

Tier Brand & model Part # Price Link Notes
Good Coldhose.com GM 1978-93 motor-swap hose kit HK1008 $67.25 base, rises with fittings [16] 5 ft #8 discharge, 6 ft #6 liquid, 5 ft #10 suction (a bit more flexible than factory #12). Needs local crimping. Builders on gmsquarebody use Coldhose plus a local A/C shop [20][21].
Better A/C shop builds hoses from your compressor and condenser n/a price not confirmed (one forum reference: about $120 for the Coldhose parts) [21] Best way to get header and steering-box clearance right.
Rebuild path CJ Classic Trucks A/C service kit with accumulator, C10 73-84 ACHA25 price not confirmed [22] O-rings, accumulator, oil. Page was not fetchable.
Rebuild path Four Seasons 57052 remanufactured GM A6 compressor 57052 prices conflict: $414.87 to $535.71 (eBay listings), $254.99 to $344.00 (other retailers), $148.35 (Walmart listing); none confirmed on a live page [23] A6 compressor for 1971-77 C10s (listed as fitting a 1977 C10). Original-style R12 design; the A6 is heavy and bulky.
Rebuild path (missing from first draft) Old Air Products Pro6TEN R134a bolt-in replacement for the A6 ACP6050 (1976-77 GM, single groove, hi-pressure switch, OPGI); 212201HP (single groove, CJ Pony Parts) $449.99 sale / $495.95 list (OPGI); $466.99 (CJ Pony Parts); search results, not fetched [41] 10-cylinder, aluminum, 52% lighter than the A6, fits the original A6 brackets and hoses, intended for use with an STV/POA/VIR-eliminator update kit. This is the key part for a factory-look rebuild and avoids new BBC brackets and hoses.
Parallel-flow condenser (missing from first draft) Vintage Air SureFit condenser kit with drier, 1973-80 Chevrolet pickup 021573 $358.99 (Berry Performance, fetched 2026-10-12) [42] Parallel-flow, 24 x 14 x 0.75 in, 6 AN/8 AN O-ring, binary switch, hardlines. Already part of the full SureFit kit; buy separately only for hybrid or serpentine builds. At 0.75 in thick it is the sensible choice behind a Cold Case radiator stack.
Rebuild path CJ Classic Trucks evaporator core, 73-75 106215 $96.99 (CJ Pony Parts, snippet) [25] The core for 1976-80 is a different part; verify.
Heater Aluminum heater core w/ A/C, 73-87 C10/CK HC36 $39.99 (CJ Pony Parts, snippet; not re-confirmed) [25] Cheap insurance if the original box stays.

Refrigerant side (service)

Item Cost Source
DIY: vacuum pump, gauges, can tap, R134a, oil owner has tools; refrigerant roughly $10 to $30 per pound [24]
Shop evacuate and charge general 2026 range $320 to $1,100 per system, and $150 to $300 for a simple recharge; I found no Kansas City specific quote [26]
R-12 $15/lb to $350/lb in search snippets; unreliable [24]

Vintage Air systems are designed for R134a only, with a capacity of about 1.8 lb (28.8 oz) [6].

Fitment & gotchas

  • Passenger-side BBC compressor. Square-body BBC brackets differ completely from SBC ones. A gmsquarebody poster put it plainly: "The setup for the big block is completely different than the SBC. They are complicated enough that it would be hard to replicate the design and fabricate new ones" [20]. Trucks built before 1/1/85 use the A6-style layout; later 1985-86 trucks changed compressor and smog-pump setups [20][33].
  • Hose runs. Hose lengths and fittings must be verified; the A6 and Sanden fittings differ [20][21]. Plan to have an A/C shop crimp them, or buy a beadlock crimp tool. Builders have routed hoses through the radiator support and fender for concealment [20].
  • Pulleys and belts not included. Vintage Air lists V-belts and pulleys as customer-supplied [3][6]. A 2-groove (double V) clutch is needed for V-belt use; do not order a 7-groove serpentine clutch such as Vintage Air 04808-VMA. Check alignment and belt count with power steering and alternator on the BBC.
  • Water pump length. Old Air sells separate brackets for long vs. short water pump [12][13]. The 454's pump length decides the part. Confirm on the engine in hand.
  • Header and steering-box clearance. The passenger-side compressor sits near where full-length headers want to run. Mock up with the actual headers before ordering hoses. The Old Air 40-118R "wide mount" is described as designed for low-hood use with roomy bays [13].
  • Glove box. The SureFit "eats most of the glovebox away" [17]. It is replaced by a molded, reduced-capacity glove box [3].
  • Radio and dash speakers. Vintage Air says the SureFit may interfere with some OEM radios and in-dash speakers [3].
  • Firewall. Vintage Air supplies a flat steel cover plate; seal with heavy-duty flexible caulk so no engine heat or cold air leaks [27]. Factory A/C and heater-only firewall openings differ [28]; the source thread does not give dimensions, so rely on the vendor's factory-air vs non-factory-air SKU split.
  • Heater hose. The kit needs 5/8-inch ID heater hose, bought separately. Hose clamps are not included [29].
  • Evaporator box fit. "It's a tight fit but the evaporator box will slide into place underneath the dash." It must be leveled front-to-back and side-to-side before final tightening [29].
  • Louver cutting. One squarebody install required cutting the factory driver-side louver duct and modifying the glovebox from a template [29].
  • Condenser mount. The condenser's top bracket sandwiches between the grille and radiator core support [27]. Then the drier mounts to the left of the condenser.
  • Cooling stack thickness. A Cold Case aluminum radiator with dual 14-inch fans, GMT556A-1SK, for 1977-87 C10 automatics, $816.54 on the Eckler's page (fetched 2026-10-12, currently out of stock; 2200 CFM fans, 5.0 stars on 4 reviews) [30]. One reviewer says the shroud fit flawlessly; another needed to fabricate lower shroud mounts [30]. Add the condenser thickness and verify clearance before ordering.
  • Compressor oil. Use the right oil for the compressor. An ester or PAG choice should match the compressor maker's instructions, and flush the old condenser or replace it. Parallel-flow condensers generally cannot be flushed, so replace rather than flush (general industry guidance; not stated in [19]).
  • Dehydration time. Pull a vacuum for at least 15-30 minutes, ideally an hour, and confirm it holds before charging [18].
  • Charging by weight. Vintage Air specifies 1.8 lb (816 g) of R134a [6]. For a converted factory R-12 system, use 75-85% of the R-12 weight and tune by pressures [18].
  • Condenser airflow. R134a systems in hot weather are condenser-limited. Idle and slow traffic are the hard cases. Forum posts in [18] also recommend electric/pusher fans for low-speed cooling. Add a dedicated condenser fan if the radiator fan does not pull enough air across it [31].
  • Gen IV vs. Gen 5. Early Vintage Air units had doors that "wouldn't fully seal"; a dealer said Gen IV addressed this [17]. Buy Gen 5.

How it touches other systems

  • Accessory drive / serpentine decision. This is the biggest dependency. Serpentine kit pricing runs $2,295 to $2,900 and usually includes the Sanden compressor [14][15]. Decide this before ordering any A/C brackets.
  • Cooling (Cold Case radiator, electric fans). Engine fans and the condenser compete for the same air. Condenser fans should be controlled with an A/C-triggered relay and the fan stack should be spec'd together [30][31]. An A/C compressor adds engine heat load at low speed.
  • Engine and idle. The compressor takes about 200 rpm off idle in one owner's experience [32]. A lumpy cam may idle poorly with the compressor engaged; the A/C should not be the reason to soften the cam, but a small idle bump (or EFI idle control) may be needed. Sanden compressors have rpm limits and rotation requirements; the 508 is rated to 6,000 sustained, and the engine's 5,500-6,000 rpm target is at the edge [10][32].
  • Power steering and alternator. Sharing the front of the engine means belt routing, alternator position and PS pump must be planned together. A forum poster on an '85 K30 454 used a Vintage Air BBC Sanden bracket (VA151370BCA) with a single-smog-pump PS setup, and had a local A/C shop make the hoses [33]; bracket fit with the PS pump is something to verify, not assume.
  • Headers / steering box. Passenger-side compressor vs. header tubes; see gotchas above.
  • Electrical. SureFit needs a fused power feed and relays for fans; the owner is comfortable doing this.
  • Brakes. Vacuum power brakes need cam vacuum; the Gen 5 uses no vacuum for A/C controls, which removes one more vacuum demand from the system.
  • Interior / dash. The dash must be out for installation, so schedule A/C install with interior and wiring work.
  • Firewall. Firewall paint and seam sealing should happen before the SureFit cover plate goes on.
  • Body / paint. The firewall and cowl are painted before the box goes in. Plan the sequence.

Check on the truck

  1. Is the compressor on the passenger side, as the 1973-80 BBC layout suggests? Which water pump (long or short) is on the 454?
  2. Is the factory evaporator box still in the truck, and is it a factory-A/C cab (A/C dash vents and larger firewall openings)? A heater-only cab needs different kit numbers.
  3. Will the accessory drive stay V-belt, or go serpentine?
  4. Are you keeping the factory dash vents and slide controls, or are you happy with electronic controls?
  5. What radiator and fan setup has been chosen? Is there room for a condenser plus the Cold Case core?
  6. Do you want R134a only (my recommendation)?
  7. Does the truck's A/C dash have the factory A/C vents? That affects Old Air and Brothers ordering.
  8. Will you charge it yourself with a vacuum pump and gauges, or use a shop? I found no Kansas City-specific price.
  9. Is it a 1977 with factory air from the factory (also tells you 945619 vs 941619)? Check the VIN and build sheet for the A/C RPO (C60).
  10. Which Vintage Air version do you want: the standard kit or the separate evaporator, condenser and hose kits?

Fact-check notes

Checked 2026-10-12 by an adversarial pass. Live-fetched and confirmed: Old Air CAP-7412E-PS ($2,095), IP-7412E ($1,395), 40-116R and 40-118R ($126 each, long vs short pump, passenger side), 21-4515 ($280), SW Classics 945619 ($2,400), H&H 23187389 ($2,399.95, BBC long pump), Lutty's VA945619 ($2,330), Coldhose HK1008 ($67.25), OER AC4510B, Classic Industries help page for 944175, Cold Case GMT556A-1SK ($816.54), Berry 021573 ($358.99), plus most gmsquarebody posts. CJ Pony Parts, Speedway, Jegs, Classic Industries and Walmart pages returned 403 or empty and stay snippet-level.

Changed:

  • 945619 is the Big Block / long water pump / factory-air kit and already includes compressor and brackets; the draft recommended buying an Old Air bracket and SD508 on top of it (duplicate purchase). Recommendation, budgets and serpentine path corrected.
  • The H&H link used for the 945619 price was the non-factory-air 941619 page; replaced.
  • SD508: wrong specs (154 cc, 7 pistons) corrected to about 138 cc; 04808-VMA is a 7-groove serpentine clutch, not usable on the V-belt bracket; V-belt part numbers 04808-VUA/VUQ and 048085 listed.
  • OER AC4510B price corrected from $189.99 to $265.99; Old Air 21-4515 price added ($280).
  • Classic Auto Air part numbers: CA2030349 and C2030349F are LS versions; CA203034F is the non-LS factory-air listing.
  • Front Runner: contents (water pump, alternator, PS) added; unverified "15133-VCB driver-side" claim removed.
  • Misattributed quotes removed: "money ahead with a kit" [17] (thread was roughly 50/50 for factory air), "116 degrees" [18], "PS brackets would not fit a BBC" [33], and the parallel-flow-flush claim [19]. The 33F Chevelle was a factory POA system.
  • Dead or wrong sources: 4s.com PDF (unrelated file) and the vintageair.com University page (404) flagged.
  • Added missing options: Old Air Pro6TEN bolt-in A6 replacement, Vintage Air 021573 parallel-flow condenser kit, Cold Case price.

Still unconfirmed: BBC fitment of Brothers, Old Air Hurricane and Classic Auto Air kits; 1977 454 water-pump length; Four Seasons 57052 live price; SD508 V-belt live price; SureFit evaporator-kit price; any Kansas City shop quote.

Sources 42

  1. cjponyparts.com (search snippet)
  2. cjponyparts.com (search snippet)
  3. swclassics.com (fetched)
  4. oldairproducts.com (fetched)
  5. oldairproducts.com (fetched)
  6. hhclassic.com (fetched; BBC long-pump factory-air 945619 at $2,399.95). NOTE: i-23187379 in the first draft is the non-factory-air 941619 kit and should not be used.
  7. help.classicindustries.com (fetched)
  8. cjponyparts.com (search snippet)
  9. oerparts.com (search snippet)
  10. speedwaymotors.com (search snippet; also jegs.com and opgi.com)
  11. oldairproducts.com (search snippet)
  12. oldairproducts.com (fetched)
  13. oldairproducts.com (fetched)
  14. cjponyparts.com and classicindustries.com (search snippets)
  15. cjponyparts.com and cjponyparts.com (search snippets)
  16. coldhose.com (fetched)
  17. gmsquarebody.com (fetched; owner experiences with Vintage Air)
  18. gmsquarebody.com (fetched; R134a conversion, charge, evacuation)
  19. gmsquarebody.com (fetched; 1979 454 C10 factory-air thread)
  20. gmsquarebody.com (fetched; 454 A/C brackets); also gmsquarebody.com (fetched; '86 conversion, R4 reliability)
  21. gmsquarebody.com (fetched; compressors used on square bodies)
  22. cjponyparts.com (search snippet)
  23. ebay.com (search snippet, Four Seasons 57052)
  24. selector.kurlon.com (search snippet; low-quality aggregator, treat as indicative)
  25. cjponyparts.com and cjponyparts.com (search snippets)
  26. selector.kurlon.com (search snippet; general, not Kansas City)
  27. inthegaragemedia.com (fetched; 1967-72 install, same firewall-plate approach)
  28. gmsquarebody.com (fetched)
  29. fuelcurve.com (fetched; 1987 Suburban SureFit install)
  30. ecklers.com (search snippet)
  31. 67-72chevytrucks.com (search snippet; 403 on fetch). The 4s.com PDF in the first draft is an unrelated packaging file and was removed.
  32. gmsquarebody.com (fetched)
  33. gmsquarebody.com (fetched; 454 H6/Sanden bracket thread)
  34. cjponyparts.com (search snippet; $2,128.99 sale, $2,299 MSRP; the heater-only kit)
  35. vintageair.com (dead: 404 on fetch; not relied on)
  36. gmsquarebody.com (fetched; 1977 C10 AC thread)
  37. gmsquarebody.com (fetched)
  38. cjponyparts.com (search result; 81-87 Brothers kit)
  39. luttyschevy.com (fetched; VA945619 $2,330.00, option configurator)
  40. cjponyparts.com (search result; 403 on fetch)
  41. opgi.com and cjponyparts.com (search results, not fetched)
  42. berryperformancesales.com (fetched; $358.99)