It depends on how much you want to tow, what springs you have on the Cherokee, and what axle gears you have.

Also, BJ is right -- the Cherokee does not have a frame -- it is unibody construction.

1977 CJ-7, fiberglass body, AMC 360 w/ headers, DUI ignition, Edelbrock intake and Holley 4150 carb, TF999, Dana 300, 4.56 gears lockers, York air comp, 4" susp lift, 2" body lift, BFG 35" M-T tires, Megashifter, AGR pump & box, REP8000 winch.