Anything out of a 55 to 59 1/2T should work. You can get the hiway ring and pinion for them now. Could be other rears to that I don't know about. Some of these other bolters know more than I. I used a 59 1/2T rear with a 55 pass. car drive shaft and saganaw 3 speed trans. It all bolted up fine. I've changed it all since.