You didn't mention what kind of transmission you have.

If high gear in your transmission is 1:1, then I'd recommend 4.10:1 gears if you do most of your ddriving on the street, and 4.56:1 gears if you do most of your driving offroad.

If high gear in your transmission is an overdrive gear, I'd recommend 4.56:1 gears if you drive mostly on the street and 4.88:1 gears if you drive mostly offroad.

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.