You can safely do about 1.5" up front lift...which matches the 1.5" you get from the 3" longer than stock shackles.



If you add AAL's, you get another 1.5" of rear lift..and that porn star/rear end up in the air posture.

The rear a bit higher, like stock, is intended to give some settling room when loaded up...too high a butt makes the rear swing wide in turns by raising the center of gravity in the rear more than in the front...but, it can improve hill climb performance at the expense of pretty much everything else.