A supercharger is not a waste on any vehicle, i would definatly go with the 4.10's, i have them in my auto car and I wouldnt change them, the rpm difference from 3.73's to 4.10's on average is about 300rpm, as for the getting the car reprogrammed i never had this problem, ive heard of a couple people whom have but the problem was solved by manually shifting the car.