i ordered wheels that have a 4 inch back spaceing whould that be enough for 33 12.50's under a 4.5 inch lift. all i care about is hitting my lower controle arms im going to cut everything else out. and one more question how bad is my gas milage going to be with stock gears and about how would it run. be as discriptive as possible because im getting the tires on sat and i have to know if im going to stick with the 31's or go back to the 33's i tried to fit before i bought new wheels. thanks