Maybe what 69racer said will work for you. In my opinion having done many of these over the years in rear-wheel-drive gm's as a working mechanic I always just pulled the upper control arm to work on it in a vice. It's literally a 15-minute job barring frozen bolts. just have a jack or stand supporting the lower control arm/spring, keep track of the shims on each bolt and don't use a Seperator/pickle fork as you take a chance of tearing the ball joint boot if you do. Just use a pry bar under arm while you hit the spindle were the ball joint stud goes through with a Hammer. If you have an air chisel with a flat bit, it works even better. I personally have always found it a fight to press the bushings in and having it out gives you your best advantage.