Steve your local track is nice and open flow and good speed.
I gear my at 5 low and 6 low final drive at 19t epic pro outlaw
I would use the 128 spur and start with the 36-38 pinion first and watch the car in the straight away , and in the turn
If your car still going fast before the end striaght way gear up one more teeth each time ..Make sure it doesn;t boge coming out of the corner Good luck