I had to wait for one to get ordered, so the uppers got installed a week later than my lowers. and I did not have to take off the lower at all to do the upper.

I know on my uppers, the bushings in the control arm were creaking and the tires definately cambered in at top. Went the whole control arm route because it fixed it all at once.

Twice I got ball joints listed as replacements for the uppers. and they looked way different, and when I went back it was because they were for different setup. Whether 4x4, torsion. I don't know.