Best bet is to piece it together. When I did mine there wasnt a decent option for a "kit" lift. Rear springs are specific to the mj. General spring and hell creek both make rears. The front is all shared with the xj, there is plenty of info out there on what is needed to lift that. It will end up being way more than just swapping springs if you get above 3". 31x10.5's will fit stock with a little rub. There are several ways to fix that.