[Mike C]

Most any of the name brand kits are good. I have Rancho 4" springs on my Jimmy in the front and I have 4" lift Nationals in the rear. I had a 2 1/2" add-a-leaf and blocks originally, and I bent the crap out of the spring perches. Don't do it in two steps like I did, replace all 4 springs whatever height you decide on. I have 36 12.5 16.5 Wrangler RT II on mine, (which are almost exactly the same size my 35 12.5 15 BFG MT's were) and it's great on the street but a little too much off-road. Figure 4" and 33's for off-roading or 6" if you want to run 35's.