The issue you're going to run into is that the Pro Comp 6" lifts for that year were really just "tall" 4" kits that used the 4" crossmembers and knuckles, but just had taller strut spacers, so you can't add much in the way of ride height. You could use an adjustable coilover of some sort to squeak out maybe another inch of ride height then use a standard add-a-leaf kit in the rear, but you may still rub with a 37x12.50". You will probably need an aftermarket front bumper with more clearance if you want to clear 37s without having to trim too much. However, you'd likely still need trim a smidge of the back side of the front wheel well in order to get a 37x12.50" tire in there. All of this also depends on what wheel you're using, specifically its width, offset, and backspacing. Your best bet would be to call us directly at 623-434-5277 so we can get more specific about your truck.