I run a 700r4 behind a 270 gmc with 370 gears and 25 in. tall tires and its just about perfect. I would like to try some 390s as I could be a little lower geared. I can't imagine using 273 gears that's awful tall gearing for the lock up clutches.
Last edited by badsix; 04/19/13 10:11 PM.
