i used to wheel with a guy that had a lifted kj, he sais the only good lift is the Frankenlift. its a mix of the best parts from all the lift kits out there for the kj. apparently there are a bunch of different lifts but they all have weak points. ive seen the old man emu kit, it looked pretty good. and Deaver has rear springs for the kj as well. good luck, do some research though.