Quote:
Originally Posted by WildBillyT
I don't know about the 3rd gen stuff (year range) but the 60s and 70s truck motors I've had (4 of them) were all 4 bolt mains.
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the only 2 bolt main engine i ever took out of a truck was 2 wheel drive it was an 89 chevy 1500 so maybe its 4x4s that came with the 4 bolts idk i just know from my experience on them it ight be something they started doin in the 3rd generations
