Any problems going to a 4\" lift? Well the time has come... I'm gonna go from 2.5" lift to an all spring 4" lift on my 84K5. I'm still shopping around for some prices though. My question is what else do I need? I already have extended brake lines,and a steering arm (thanks DuneRunner) .. My rear driveshaft that I have know has been extended for my current 3" lift.. Here is a list of the things I need: Shocks U Bolts 4" Springs... anything else?