I have got an original 283 and 3spd in my 65 c10. It runs fine but a little on the worn side. The tranny is perfect(other than the floor shifter kit put in before I owned it). I've been looking for a rebuild kit for a 283 and can't seem to find one, any suggestions? On the transmission... what would bolt up and best cooperate with my 283? I'm not looking for great speed, just a good runner. Also need and ashtray. If anybody has any advice, I'd greatly appreciate it.