I need some help!!!

[twoodson]

I have a 1987 Chevy SWB with a 350 TBI. I have lowered my truck using Western Chassis 2.5" drop spindles in the front and the Western Chassis 4" drop hanger and shackle kit in the rear with the Doetsch Tech shocks on all for corners. I also replaced both front coils with factory coils. I want to order some WC 1.5" coils for the front for a 4 inch drop. However I had the truck on close to level ground and measured and I noticed that the left side is 3/4" lower than the right side and I cannot figure out what this could be. If anyone has any ideas as to what I can do please let me know.. Thanks!!!