Intake manifolds are cast iron unless otherwise noted.
Code Number Year(s) Application/Notes
571145 '57,'58 371, Tri-carb, 3 2bbl. Easy to spot by the 3 carb holes.
D2 580676 '61 394. 2bbl. Iron
D3 382856 '64 394, UHC 394. 4bbl. Iron.
382855 4bbl. Iron.
1954 and 1955 324s' have smaller intake ports and valves than the 1956
engines. 1955 and earlier four barrel intake manifolds won't fit a 1956 engine
unless you put a dent in the lifter valley cover. 1957 and later cylinder heads
will physically bolt on to 1949 to 1956 engines, but the port matchup on
intake maniflolds will be off because different cylinder deck heights are used.
1957 and later cylinder heads have larger coumbustion chambers and valves.
[ Thanks to Joe Padavano, [email protected] for this information ]