Originally Posted by allansmith859
Hey guys gotta a question. has anyone ever had an engine out of a 94 c1500 that was a 4 bolt main. In my other post pre-tuner i think it was said his 91 c1500 (I think thats what year it was) had a 4 bolt main in it. Just curious. I thought all these had 2 bolt mains.
You just never know till you open it up. Generally GM half ton trucks use the 2 bolt block with a cast crank. The 3/4 ton and up use the 4 bolt block with a forged crank. But it isn't uncommon to find the heavy duty engine in a half ton truck.