no, the buick 350 is absolutely not a chevy 350. aside from such bolt on parts as the carb / alternator / power steering pump there aren't ANY parts that interchange between these engines (not even the transmissions as chevy uses a 5 bolt pattern for the bell housing). buick 350s were produced from 68 up to ~81.
the same answer applies to olds and pontiac 350s (that they are different from each other AND the other GM 350s) although buick, olds and pontiac can all use the same transmissions as they use the so called BOP (Buick, Olds, Pontiac) 6 bolt bell housing.
SBB buick aftermarket stuff is really sparse but you should try www.taperformance.com, www.paeenterprises.com (for building advice) or www.postonbuick.com
i have seen a couple of SBBs built to over 600hp and there's even a turbo'ed unreinforced block buick 350 that's gone over 1000hp. so there is definite potential there ... it's just that it can be expensive to get too.
The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
Vladimir Lenin
Government schooling is about "the perfect organization of the hive."
H.H. Goddard, Human Efficiency (1920)
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