I guess you could say that CJ's are money pits. Get rid of it now if you don't think you can stand the drain. Or, slow down. You could buy the rims and tires and go cheap for now on the lift. Rims and tires will cost about $1000. Then you could get a shackle lift and body lift for about $175 if you shop around. This might affect the steering though. Shackle lifts can cause your Caster to be way off and make it difficult or impossible to keep straight on the road. Personally, I'd save my ducketts, like I already did, and get the rims, tires as a package, and the 4" lift kit all at once. Then you can regear the axles one at a time or choose not to regear for a while.
I have no vibrations at all. Lowering the xfer case eases the driveline angles and the DPA aids in steering geometery. The rear springs also come with a 4 degree wedge to help keep driveline angles correct. HTH
Look me up when you're in town. PM me and I'll give you my phone number.
85 CJ7 4.0L/SM465/Dana300/AMC20/Dana30, MPFI,154K miles - 33" 12.5's Pro Comp MT's, one piece axles, Detroit Softlocker rear, Lock Rite front, Warn Hubs, 4.56 R&P, 4" BDS lift, Warn x8000i, Warn winch guard, Hi-Lift, Tuffy console, Four X Dr. rocker guards, Rock Hard sport cage, Kilby OBA with 1.75 gal tank and York 10.3cc compressor, Tube fenders by GenRight Offroad, Fabricated rear bumper and tire carrier.