Ok, well my Dad and I tackled the rear upper control arm and ball joint on the Jeep today. The bushings and ball joint were definitely worn, lots of play in the joint. Everything went great, the ball joint bolts busted loose pretty easy, just a little persuasion from a long knuckle buster. Only one problem, IT STILL CLUNKS! It got late so we didn't look into it further but I guess I still have some work to do. I know we got everything tight on the control arm, and the sway bar is fine. Back to the drawing board.