1) 33s are not "tippy." A truck that is too tall can be. If you modify the suspension and add tires, know that you've modified your vehicle handling and don't expect it to drive like a Porche. I ran 33s on mine and I think it handled better than stock.
2) Springing over the rear axle is a great way to get 5.5" of lift. It is fairly simple if you can grind and weld, and even if you can't it is a reasonable job to take on. Just pick up a set of weld on spring perches, figure out where they have to be on the top of the axle, and weld them on. You'll also have to extend the brake line if you go that route, and the driveshaft may or may not work out. Check it. If it is too close to the end of the spines, it could come apart if you flex the truck out.
Going the 5.5" lift route means a committment to spend some real money in the front end, however, hence the suggestion to lift it about 1-2" with cheap means and use a body lift for the additional 3" (doesn't effect suspension and is cheapest way to go). Up front, you'll need a 6" lift, which means steering issues that are pricey and difficult at best.
Mine in the pics above is set up like I suggested in my post -- it worked VERY well.
3) Find a door in the salvage yard and stick it on. Simple 6 bolts and if you have electric locks, etc., a couple of wires to unplug. If you can't find a decent one, let me know, we have a pull-a-part here in Louisville that likely has a bunch of decent ones. Wish you had a four-door -- I have a very nice set of doors (manual everything) for one of those. Change out the lock cylinders and you keep the same keys, otherwise, make sure you get a key!
4) I have a set of Dana 35 manual hubs (used factory) that I'll sell. Let me know. ($50, you pay to ship). Manual is best -- period. The auto ones will fail the time you really need them. Ask me (and about 10,000 others) how I know...
5) Cut a piece of sheet metal and rivet it over the gash in the side. Who cares... As long as the truck runs. Stop thinking beauty queen -- that she'll never be, but it can run... Again, my silver one in the pics above was picked up after a front end wreck for $200. I cut away what I couldn't fix, pulled the rest out by using a chain hooked to a tree, and hammered it down until it was close enough to work, then wheeled the snot out of it. I ran that truck for another 4 years after buying it, drove it from one end of the country to the other (yes, DROVE to Moab, wheeled it, drove home, drove to Florida, wheeled the beach, drove home, drove to Wisconsin... drove to Pennsylvainia, etc., etc., etc.) and the truck is STILL running in Jman's hands.
http://www.explorerforum.com/forums/showthread.php?t=205372
6) At the bottom of the cab, cut out enough of the sheetmetal to weld in a 2 x 4" steel tube. Patch it as needed to connect it to the body, and make a couple of supports welded to the frame. That way, you fix a rust problem and make a good set of sliders in one swipe. Something like this, only set them right into the lower part of the body.