Another recommend me gears thread!
Give me a call when you're ready for the 9" rear. I have the best prices and expert knowledge on any rearend combo you want!
When you say mostly track car do you mean 1/4 mile , 1/8 mile , road course ,etc... They will all have different needs.
If drag race - figure what you expect the car to be trapping and figure which ratio puts you at the top of 4th as you go through the traps on the tire rollout/height you expect to be running on the rear leaving a margin for error that you can make final adjustments to with rear tire height if need be to dial it in.


. I will drive it on the street some.