Welcome to mud TNRunner!
If I were you, I would watch craigslist for a set of Toyota CV's that are still in good shape, and then put them in. Get yourself some 33's, crank the torsion bars, maybe a spacer in the rear to level it out, and go wheeling.
A solid axle swap is a huge endeavor, that requires specialized skills to do properly. I've wheeled my 89 IFS 4Runner for the last 6 years with 33's, a Marlin crawler transfer case gear set, and more recently an Electric locking rear diff, and I've had not 1, not 2, not 3, but 0 problems (yes, 0) with the front end. Some people do seem to have trouble with it, but if you pick your battles you will not be breaking the front end on your 4Runner. Unless you are into crazy rock crawling, I would implore you to reconsider. If you can't do the work yourself, and scrounge the parts to make it happen, you're going to be $1500-2500 into doing this swap when it's all said and done...
The bottom line is, the economy is bad, everyone is selling their toys... If you really want a rock crawler, you can buy a built truck for less than you can build it these days....
I hate to be a killjoy, but I'd rather see you having fun and saving money, than cutting up a truck to make it into something that is way overkill for what you want to do with it...
