What's the highest lift you can get from the 5100 Bilstein adjustable shocks? If you get these to level out a 07 NBS GMC should I get blocks for the rear or these shocks all the way around or will just the front level it up good?? I had a lady at a truck place that may lift my truck say you can get 4" and more lift from these shocks. I think she was confused with something else would that be right? Also do you need a realignment if you just get the leveling shocks put on the front? Thanks for the help!