Having side to side body sway, but none front to back. 5 leaf spring front and 6 in back, don't know how old. New Bilstein gas shocks. Have sway bar with disconnects, new HD front shackles, 4" lift, block in rear. No bump steer, no problem with motion front to back, some wander (front is higher than back, which I'm correcting and may contribute to slight wander, along with 35's). Have new poly greasable spring eyes in front. Rears aren't installed yet. I'm thinking the shocks, tho new, may be too soft with the poly bushings in there now. It's just the body itself that rocks from side to side, pretty badly at highway speeds. Any ideas?