Buick small and big blocks. And, no, not all GMs are the same engine. Actually none of them are until the mid 70s when the "corporate" engines started being used. Olds, Buick, and Pontiac 455s have absolutely no interchangeable parts, and neither do Olds, Buick, Pontiac, and Chevy 350s. You could probably find some bolts that would interchange, but absolutely nothing else is the same, they're as different as a Studebaker 289 is to a Ford 289.Hi yeah I know the 292-312 Y blocks have the back dizzy.. but they aren't really around ..
I was think 460, 351 302 400
What GM's other than the Caddy had front dizzy??