what cant run 12's with out what??? i ran 12.97 at 110 with stock rear and 255 50 16 sumotumo htrz (junk) all i had was a clutch and alum flywheel, lid and ported tb, the key is the 60 ft with all that i still had a 2.05 60 ft wich sucks and still ran 12.9 next pass i broke an axle and the 12.9 pass i bent my 3/4 shift fork...