I figured that's what the body lift is, more specific... I'm looking for recommendation on spring with or without shackle lift to replace it. Is there any advantage to longer shackles in addition to springs or does all spring work better?
Do you have plans to put fender flares back on? If you plan to stay at 31s, then I'd run a 3" lift. You could do a 2.5" lift (OME,RE,etc.) at first, and then throw some 1/2" booms on there if you wanted to gain more height. Just my opinion, but it really depends on what your future intentions are w/ the Jeep.
Keep in mind that those flatty fenders will open the front up more. Here's some pics of mine. The first one is w/ 2.5" springs, 1" shackles, and 31" tires w/ stock flares that were trimmed. The second is the same setup, only w/ 32" tires. The last is the same lift, but w/ TJ rear flares, trimmed rear wheel well, and flat fenders and the same 32" tires.