I would check around some of the offroad forums and ask this question.  Torsion bar keys are good but I believe there are some other ways which have pros and cons as well.  Can't speak to the specific pros/cons of torsion bar keys since I've never used them myself, just heard about their use from others.

What is the reason that you need to 'level out' your truck? Did you put a snow blade on? or dump a camper or trailer in the back. We don't read minds, please explain more.

Sorry I wasn't clear , the only reason is looks , The truck just rides higher in the back !  MTP

leave it alone if you start turning them you will have to have them readjusted when alligment is done.all trucks look this way.