So after some research, I need a 3.42:1 ring and pinion with a series 3 open carrier 30 spline. It is a 12 bolt rear, not a 10. Years that fit are, 1965 -1982. It has a 3.73:1 in now. It is in good used working condition I will be looking to sell or trade for what I need.

Last edited by sps; 12/23/2022 3:39 AM.