69 Z/28 Day II Project (Air Force Brat)

[big gear head]

The S60 is a nice rear end with some nice upgrades over the original Dana 60 rear end. It's also usually a little cheaper than some of the other options. Moser also makes an upgraded 60 rear end.
I changed gears in my 9 inch last week and found that the bearing cap bolts on the ring gear side had stretched and bent, and I'm using the best nodular case that Ford made. The bolts are 1/2 inch, compared to the 7/16 bolts in the 12 bolt. My axles also have some twist in them. I'm going to have to upgrade to 35 spline axles and an after market case with larger bolts and steel caps if I keep racing this thing. I'm making 563 HP.