Rear of truck not leval from left to right

[smorg007]

My 1/2 ton SWB is lowered 4 1/2 (2 1/2 spindle & 2" coils) in front and 5 1/2" in rear with 4" drop coils and 1 1/2" lowering blocks. All springs are brand new. The truck sits approx 3/4" higher on the right (passenger side) than the left (drivers) side. It has the stock pan bar mounted in it's brackets and stock location. Could this be causing the issue? Do I need an adjustable pan bar to change the alignment of the rear. If so how do I do this. If I reduce the height of the passenger side lowering block by 3/4" and this levels the truck what issues am I creating if any. Thanks for you assistance.