Originally Posted By: meep
I never knew that. In fact, I thought they were all the same since the designs were so similar..
They're only similar in displacement. I think we totalled up the actual parts that interchanged between a Chevy 350, Olds 350, and Buick 350 one time. HEI module and distributor rotor were about it. Heck the Buick even has the distributor in front and tilted like a Mopar does (other side, though if I recall). And the Olds 350 isn't even really a smallblock, its a low-deck version of the block that the 403 and 455 were built in.
GM never really let go of divisional engines. in the 70s they had three (count 'em!) 455 cubic inch v8s that didn't swap parts (Buick, Olds, Pontiac) plus a 454 (Chevy) and a 472 (Cadillac). Same with 350s, and there were several completely different engines around 400 CID too (Pontiac 400, Olds 403, and TWO Chevies counting the 396/"400"/402 big block and 400 smallblock). Even in the 90s and early Y2Ks, different divisions just became responsible for different engine sizes types so the crazy overlap was gone. Buick made the big v6 (3800), Chevy made the smaller ones (3100, 3400), and the LT series v8s that Holden and Pontiac also used, Cadillac did its own thing (Northstar). The Ecotec and LS series are probably the closest to "corporate" engines.
That General. He do some strange things...
I never knew that. In fact, I thought they were all the same since the designs were so similar..
They're only similar in displacement. I think we totalled up the actual parts that interchanged between a Chevy 350, Olds 350, and Buick 350 one time. HEI module and distributor rotor were about it. Heck the Buick even has the distributor in front and tilted like a Mopar does (other side, though if I recall). And the Olds 350 isn't even really a smallblock, its a low-deck version of the block that the 403 and 455 were built in.
GM never really let go of divisional engines. in the 70s they had three (count 'em!) 455 cubic inch v8s that didn't swap parts (Buick, Olds, Pontiac) plus a 454 (Chevy) and a 472 (Cadillac). Same with 350s, and there were several completely different engines around 400 CID too (Pontiac 400, Olds 403, and TWO Chevies counting the 396/"400"/402 big block and 400 smallblock). Even in the 90s and early Y2Ks, different divisions just became responsible for different engine sizes types so the crazy overlap was gone. Buick made the big v6 (3800), Chevy made the smaller ones (3100, 3400), and the LT series v8s that Holden and Pontiac also used, Cadillac did its own thing (Northstar). The Ecotec and LS series are probably the closest to "corporate" engines.
That General. He do some strange things...