I am running a 8 3/4 and has been good for about 100 passes, Not a real fast car but its heavy and on drag radials. This stroked big block seems to make some pretty good torque down low. I have a truck Dana sitting in my garage but after going back and forth on rear ends I think I will end up with a 9" if this old 8 3/4 decides to go. There is more gear choices for the 9" and just a lot more aftermarket parts available. The other thing is that 60 is a heavy chunk of steel. Who on here doesnt want to save some weight?