I never saw you mention weight distribution. I fought it as well. Getting your track bar and drag link parallel is a big deal. When I did that (Teraflex frame side drop for the track bar) it helped a lot. The other piece of the puzzle for me was changing the weight distribution. I added some spacers in the front to level the ride and it made a world of difference. Keep in mind that your axles have to shift as your springs compress. If you have a heavy rig and are front heavy (weight distribution too much toward the front) then it will play havoc with steering. It amazed me how much 1 inch on the driver and 1.5 inches on the passenger did for my ride (leveled gas tank at 1/2 full).