I dont think I have been to the track more than once with my stang, but I know I will be driving it on the street. Because of this I am going to stick with the 4.10's. I think the 4.10's will be just the ticket for light to light drving. They should also pull like hell on the freeway with the blower. And since I dont think i ever accelerate past 90 on the freeway the 4.10's should work fine. I also imagine that since I am not driving at the track I will be ablr to put the car in 5th and pull like a mother with the blower and 4.10's. I think as long as you dont hit 5th hard (I dont even think I could power shift 5th since it is such a reach) things should be fine. I just dont see the point of building a car for the strip when 99% percent of the time it will be driven on the street.