I assume you know, the TJ stock stance has a rake down toward the nose. It is more pronounced with some lift kits. Also so you know, the measurements for fender to ground f/r are different. The rear flares are slightly higher. Most people use a 3/4" spacer. They are very common and cheap. Personally I used a 1" spacer after my BDS 2" lift. There are not may 1" spacers around but I found a cheap one. On level ground, with a bubble level on the tub rail, mine is just about dead on level.
2003 TJ, 33" BFG AT, 2" BL, 2" BDS spring lift, Truck Lite headlights, Homemade sunrider top.