The shop I work for uses Rotary brand lifts, two post style. I love them. rated at 9,000 lbs, I have lifted 10,500 on them many times and have even gotten rough with them at that weight (turning the flywheel on a diesel with a prybar gets things to start shaking a little) and have not had a problem, except that I kinda bent the rear arms a little on the last heavy one. But if all you will be working on is G-bodies i'd get a light duty asymmetrical one that allows full door openings without hitting the posts, I have to leave my car in neutral and roll it into position after getting out or it's hard to keep the door out of the post. Hope this helps.
bob
