1st differential install - what went wrong? Long and some dumb questions.

[SteveK]

I have been rad racing for years. And some friends of mine convinced me to go. So I said " what the hell"

I never gave it much thought. I do realize that it takes some science to do it right. In roadracing, you don;t want to modify the car too much so you stay in the lowest class you can fit into. So my engine is stock with the exception of some suspension stuff.
Anyway, with that excuse, I ran 14.8 @ 93 MPH.
I was happy with it. It is a stock 98 GT with 3.73, no muffler and pullies.(199 RWHP)

Steve