All you need power for in pulling in turning the wheels, i got 4.11s and with that 300 in 4 low im not worried about not being able to turn the wheels, not all to worried about being able to get the truck heavy enough, its got 2 sets of 3/4 ton leafs on both sides in the back + a helper spring, i can probably put anything i ant back there to a resonable point and it wont squat and i have a capfor it so no one can see what i got in the back