I believe most go with a 2" lift spring in the front when using XJ springs in the rear.
Or you can bastardize them and create your own lift or no lift like Erik did.
What size tire you wanting to run and are you leaving the axles full width and what size rim and backspacing?
1994 YJ 4.0L 5 spd.
flowmaster,15x12 wheels & 35x15 TSLs, sway bar discos, 3.5" leaves SOA + shackles, 2" body lift, JB steering bracket, SYE, M.O.R.E. anti-wrap bar, Bilsteins 5125s up front & BDS Hydros out back, axles in the works