what engine do you have?
When i lifted my 97 tj, i wound up with 5.4 in of lift with the re 3.5 springs. I figure my 2.5 l was too light. I wound up with major drive shaft vibe with that arangement. I bought the teraflex 3T (3 in) springs and wound up with 4.4 in lift. I then tried the tera flex 2t springs and got 3.75 in, but the rear sags with normal trail load. I wound up getting rear adjustable track rods to deal with the vibration. I have heard that the Old man emu springs ($$$) may be easier to get closer to the right lift with the right sales guy. I wound up talking to a jerk that was of no help, but I have heard of others that had a different experence.
with the re kit they have you drilling a hole to close for my comfort to the edge the axle end of the bracket that mounts the front track rod to deal with the side travel induced by the lift. with the adjustable front track rod, that is not a concern. same goes for the rear, but they usually give you a relocation bracket which deals with the shift.
If you are interrested in the re 3.5 lift, I'll give you a good deal on the one I took out, it wasn't on there more than a week.
I dealt with jim supplee of supplee 4wd in oklahoma. best prices, great guy, and most of his stuff is free shipping.
97 2.5, 4:1 xfer/sje, cv drive shaft, 3 in lift, adj control arms and trackrods, 33x10s, '03 rubi d44 f/r 4.88:1