In '87 when grandma gave me the 3/4 ton c20 that grandpa had got ready for me before he passed, I was told it had a 283. Back then I didn't know about casting numbers or how to know what was what. I just ran it and kept it tuned up with parts that were for a 283. But it had the 4g on it. It may have been a 327, I don't know, but I do know that truck ran really good. That was when the speed limits got raised from 55 to 60, so people drove even more over the speed limit than before. I had to run the truck with the engine turning 4,000 rpm's just to keep up with highway traffic.
