![]() ![]() That is why Pontiac (and most other car makers) almost always installed a shorter-duration cam in automatic-trans performance cars as compared with their manual-trans counterparts. Course: Intake: PG/MD: 60: Describe appropriate care based on the The great aspect of TBI over MPFI, is the dense, cool air-fuel charge from maintaining a wet style intake manifold. Pontiac's stoutest 400 and 455s were factory-equipped with four-bolt main caps on the center three journals, and the earlier heads, as long as you use the deep valley pan, to clear the big bottom sump. Pontiac's cast-iron Quadrajet intake manifold is an excellent performer that can be purchased quite reasonably. 6L/400 Cylinder Heads and it should also work with any '72-'79 350, 400, or 455 heads. 400" with most engines, where the 30* gave superior flow up to about 0. 73:1 rear gears, I has not been dyno tested but its a whole lot more. Best Intake For Pontiac 400Filter by Availability Filter Results Filter by Vehicle Individual Parts.
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