Just trying to start planning my summer project and need a lot of advice. I have a 1960 c60 Chevy that I am currently using. I have taken the original engine out and put a 350 in it. I cut 2 feet out of the frame and shortened it. I put a really heavy welding bed on it and I use around the farm and do odd welding jobs for the neighbors. Now finally to the question. I am currently rebuilding a 348 and I think it's going to be a runner. Now I am sick of going 40 mph every I go. With new engine I'd like to show off a little. Can I rebuild trans and rear end or should I replace them?