I ran a 13.30 @ 105 MPH spinning all the way through first gear on 17" nitto's. My goal is to run in the 12's on the 17" wheels. My gears are 3.73 and are badly worn. is anyone using 4.30's, and what are your 1/4 mile times? Does anyone think think that the 4.30's will pick up that extra 3 tenths?