Reproduction aluminum high-rise intake manifold for 1965-69 Chevrolet big block (396/427-375hp) models with special high-performance engines. This reproduction rectangular port big block intake manifold is manufactured to correct factory specifications and is the manifold found on all original high-performance L78 motors. Can be used with high performance cast iron or aluminum cylinder heads with rectangular intake ports. The carburetor mounting pad is machined for a standard flange Holley 4 bbl. carburetor. Features snowflake foundry mark firing order casting 18436572 and part number # 3933163 cast into the manifold. Replaces OE part number # 3933163.
