I just flipped my lower ball joints, and i have massive negative camber. I am not to worried about tho , because i will be baggin it soon , and would be a waste of money to get it aligned now. I am guessin if i do the top ball joint , it will go even lower , and more negative camber? The hardest part about doing this is that , 2 bolts are pressed into the ball joint bracket and are bitch to remove. We had to hit them with a sledge to get them out.Flip the bolts , and clearence the sway bar bracket, it just takes time. It willl take a day to do this if you have a press to knock out those two bolts(or slegde them out), and you know what the hell you are doing.
See Ya Dirk