some one one here posted their method. basically, he used an old round jack stand, heated up the control arm with a torch, place the bottom of the ball joint in the top of the old jack stand and hammered the old ball joint out. then put the new ball joint in the freezer, heat the control arm again, and it should drop in place. let everything come back to normal temp and you should be good. a few guys have mentioned that aftermarket ball joints dont fit 100%, some fit better then others, but its probably a good idea to put a few tac welds on the ball joint just in case. thats what i plan to do when i change mine. or you could just take it to a shop and let them do it.