Well I agree Passxj. You mention that you have fitted a ZJ pitman arm which lowers the drag link 1". But there is no mention from you or lowering the frame end of the trackbar exactly 1" as well. This is what is also called torque steer. It is critical that the drag link and the trackbar is mounted at the same height as both ends and not just parallel either. I tried this once and used a dropped pitman arm and then raised the trackbar at the axle end which made it exactly parallel. But I end up with torque steer which is what you have. So either put the standard XJ pitman arm back on or lower you trackbar bracket at the frame end 1" to match the ZJ drop.
