Originally Posted by Jon G
The rear end is a 12 bolt out of a 1969 Chevy pickup (3.07 ratio).
Jon

I think your engine will need the 0.86 OD with a 3.07 rear. I have a friend with a 67-72 truck and 250ci and a 3.42 rear and his engine tends to bog on hills with his 0.72 OD gear.

Last edited by Lugnutz; 03/16/2014 4:22 AM.