dont go with that ebay kit. ive seen it and its a rip off. you wont even need the keys if you plan on doing a basic shackle/TT lift. you wont need the torsion keys, since you are 4WD, you shouldnt be twisting the torsion bolts more than 2". get warrior shackles, you dont want to go cheap on the shackles if you are going to be hitting the dirt. you could also look into add a leafs, some people are anti-shackle swap. just lift the back end with a set of warrior shackles or add a leafs, and twist your torsion bolts 2". then get an alignment. there you have it, 2" lift for under 120 bucks. then you'll be able to fit those bigger treads on, but you will have to do some trimming.