Leveling My 04 Sierra 4x4 Problem

[Bull-Dogg]

So today after work, I went to go get my oil change and i asked the guy to show me where i would need to tighten the torsion bars, we went under and the driver side bolt on the torsion bar/key was already tight, didn't look like it had room to move, but the passenger side one looked like it still had 1/4 to 1/2 to move yet. when i got home i took the measuring tape and measured the front from ground to top of both wheel wells and it was the same height on both sides. So what should i do now to level my front end, should i go with the new torsion keys?

 

 

Also i measured the rear and and the passenger side was 3/4 of an inch lower the the driver side at the rear.

 

 

 

Does anyone have any suggestions on how i should go about leveling my front end now and get my back end equal?