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1966 SBC 4 Barrel Intake (3872783) with Rare Carter AVS Carb (L9 4028S - $50 (Elk River)
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The 3872783 manifold is a 4-barrel intake designed primarily for 327 cubic inch engines. It features a Holley or Carter bolt pattern (square bore).
Casting Number: 3872783
Material: Cast Iron
Carburetor Fitment: Holley 4-barrel or Carter AFB (not Quadrajet)
GM Group Number: 3.265
Key Feature: Includes a "hot slot" design where exhaust gases pass under the carburetor mounting pad to aid fuel vaporization, often covered by a stainless steel plate.
Applications and Horsepower Ratings:
This intake was used across several GM A-body and F-body platforms between 1966 and 1967, and as a service part thereafter. The horsepower rating depends on the specific vehicle application:
Corvette (1966–1967): Used on the 327/300 HP engine (without A.I.R. system).
Chevelle / Chevy II Nova (1966): Used on the 327/275 HP engine (without A.I.R. system).
Passenger Cars (1966): Found on Impala, Bel Air, and Biscayne models with the 327/275 HP engine.