Im sorry if this has been asked before but it seems that when ever i see a stang with a built motor (h/c/i) or a 351 they hardly ever run 3.73s with a 5 speed? Why is this? Is it because the motor has enough power not to need the extra gear? I am planning to get gears in the spring and was wondering what to go with if i will be building a motor eventually. i dont want to have to change them out again after i do up the motor. The car is street driven / daily driver in the summer. Any input would be great. thanks