There are many options out there from a suspension lift, most all of the 3/4 ton and 1 ton are the same, but I'd say call whatever company you go through to make sure you let them know the engine your running, if you've got a winch, etc. so they can get and estimate on the weight of the vehicle and stiffen/loosen them up accordingly. Here's a brief list:
http://www.rockymountainsusp.com/lif...p/1988-98.html
As far as tire size goes (and don't quote me on this one):
4" is typically good for 33" tires
6" is typically good for 35" tires
8" is typically used to cover up being less than 8"