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Originally Posted by joe_padavano
Let's all remember that in the 1960s and 70s, each GM division had their own unique engine designs. The Buick 455, Chevy 454, Olds 455, and Pontiac 455 are all completely different designs with different bore/stroke, different castings, and nothing interchangeable (except the Delco distributor cap). A casual observation shows that the Buick has a front-mounted distributor, the Pontiac has a separate valley pan with raised intake, and the Chevy has a different bellhousing bolt pattern. All four makes have different motor mounts as well. Since the A-body cars were sold by each of the four makes, the frame has pre-drilled holes for these mounts, but the actual brackets are different.
Same thing for the 350s from each division.
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A'yup, I recall said history. Question was more pertaining to a modern motor, the *GM* 502, but I got it answered anyway thanks to you and others here.
Quote:
Originally Posted by joe_padavano
... Since the A-body cars were sold by each of the four makes, the frame has pre-drilled holes for these mounts...
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Interesting, didn't know this tidbit. Makes sense though!