Also check out ARG's Super Box
There is also a company that takes your stock box rebuilds it and taps it for hydro assist. It's called the Redneck Ram
by West Texas Offroad. Rebuild and tap will cost 265. Hydro kit with rebuild, ram, hoses, and weld on tabs is 500. Kit with upgraded pump is 700. The only thing is that you will be out a jeep till they finish. Or find a junkyard one to send. Check pamsauto.com, got my 136amp alternator for 40 bucks.