If you want a decent daily driver plus a awesome expedition rig that is still capable of running the 'Con. 3.5-4" lift. 35" tires. Gearing: at least 4.88's (DD/expedition primary uses) possibly 5.29's if rocks are more your thing.
Armor (Rocker guard/sliders, bumpers, skid plate). For the skid plate either Slee's or I have Iron Pig Offroad skid plate/crossmember (more protection). Build your own sliders, using Georges design (search the 80 section on 'Mud) if you are trying to stay cheap or you can buy Slee's or Metaltech. With a '94, I would remove the fiberglass fender flares or the Rubicon will.
Unless you are going to do the part-time conversion, don't do the Longfields on an 80. They will only last about 25k miles on a full-time rig. Stock birfields are much bigger on 80's than the mini trucks, so breakage is rare.
As Rusty said, do all of your PM. Unfortunately, you are at the mileage where some of the stuff is due, as I tell other people, you didn't get that "free" 100k miles of ownership, so now it is time to pay the piper.
Now having said all of that, I will tell you that while you can take it over the 'Con and it will do it, a built 80 is really the wrong tool for the job for rockcrawling, they are just too big and heavy, plus the undercarriage is really "dirty."
If you need anything else, let me know, I can bore you to tears with my worthless trivia, just ask any of these guys.
Jack