i don't believe there has ever been a production 4 bolt main Buick block. there are 4 bolt cross bolted blocks produced by Land Rover but those are based more closely on the Buick SBB 215 than is the SBB 300.
Nailhead cranks are forged but it's not physically possible to put them in an SBB design as it's much too long. i don't think there are any SBB's or BBB's with a forged crank.
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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