Rear end advice for racing with a 4 speed

I got about the same power, but I don't race. Well one day I did, back in 2004. I made 4 passes on an old airport runway, no prep. Car went 93 in the Eighth.

My axles are Resplined C-body axles, in a narrowed rear; I don't have your kind of problems.
I gotta get me a pair of those tires!
What else are you running back there?