First of all, no offense to LaRedneck, but superlift is junk. For a short arm lift, Rubicon Express is one of the best out there. At 4" you are also going to need some driveline modifications, either a SYE, t-case drop, adjustable upper control arms, or all of the above. Depending on the size tire you plan on running as well you will really want to consider beefing up if not replacing the stock axles. 33" tires will do okay on a Dana 35 rear as long as it isn't locked and you aren't heavy on the skinny pedal, but 35" tires won't last a second even if the axle isn't locked. I am pretty knowledgeable about Jeeps, PM me if you have any real specific questions, orr I will check back into this thread later on.