Go for the 4" Skyjacker, a 1-2" body, the TJ flares and 35" tires. Then get the Super 35 kit which makes the Dana 35 rear quite strong, plus you get a locker. If you want to upgrade the front axle, get the axles out of a TJ Dana 30 front(not the axle housing, but the actual inner axles), they are stronger than the YJ's and will fit inside your Dana 30 housing. And as long as you are at it, get some gears. Of course this is only one out of many options. As mentioned, the Ford 8.8 is a popular swap. Or a Dana 60 and 44 out of a late 70's Ford, or call Currie or Dynatrac and order a couple. This is one of those topics that can be discussed for a long time. The major issue is money and what you plan to do with your jeep. It is always a good idea to plan ahead for the future of your jeep so you dont waste time and money setting it up one way and then changing your mind.
92 YJ 4.0L, 35" Goodyear MTR's, Rough Country Suspension