it might be, you'll need the biggest not you can get under the bed (i think on a 2nd gen a bolt in MIGHT do it, but i dont remember), you can goto
www.airridetalk.com and look at their notch calculator and it will tell you if you'll lay on that tire with a bolt in notch.
anyways, i'd go behind the axle f9000 bag setup in the back if you wanna stay under the bed along with a tri 4 link, you can get heims instead of bushings (get the good ones) and have short tabs and clear the bed.