Belltech says to level the truck... My rear is 1/2 inch taller on the DS than the PS. Should the front be dead even or have the 1/2 difference as well?

I kinda like it evened up and sure as hell helps to clear the charge pipes in the PS wheel well...

 

The front is kinda off too, just crank the t-bar key on the P side and roll with it.

 

Yeah, when I set up with a square from the top of the tire to the top of the wheel well, it had kind of a drunken lean lol. It's even steven right now

 

FWIW
You should measure from the center of the wheel to the lower fender. No tire pressure or wear variables that way.