Is a GMC truck just a dressed up Chevy truck?

The Buick 350 was the most prolific engine used in that time period, because they had an enormous Amount of them left over. I'd MUCH rather have a Buick 350 than a Chevy 350 any day anyway. Way more torquey. The only "weak" spot on the Buick V8 was the timing cover. It was a high wear item, because everything mounted on it. Distributor, water pump, fuel pump and I think even the oil pump body was an integral part of the timing cover. There was a lot of action goin on in the Buick timing cover, but they were really good engines.
We had a butt load of oil pressure issues with th Buick engines. Lot's of oil pump kits and timing covers. (Good for business) Did you know Buick had a
0 # oil pressure sender that wouldn't turn on the idiot light until no pressure. THat was a used car fix for the dealer.