old round fart
Well-Known Member
I just found out the differential in my 9” is a 28 spline axle. I need 31 to fit my new axles. If I have to change it out I may as well get a good ratio. My first car had a 3:08 in it but the blower overlooked that and was fine. My new car will have a big block and blower so what are you blown motor guys running?