judging by your other post, you were tlaking about an IFS chevy, and it sounded like you might wanna do some rocks, so i would say to lock the rear, and see if it will do that you want, but dont bother with the front,
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i dont know if they even make a locker for it, i assume they do, but if you are serious about this than you will be looking at doing a solid axle front pretty soon i bet