Upper and Lower Ball Joint Replacement

There is argument as to whether you "really need" a ball joint socket. Some guys have even used pipe wrenches. The height adjustment is the big bolt ---only one---"inside" the lower arm, pointing downwards

Jack the car up with jacks under the chassis---tires hanging free--"For reference" just unscrew the adjustors and count the turns roughly so you have some idea. You will feel obviously when they come "loose"

Not sure on rebound--you may have read where they are talking about moving the suspension to make certain it is not bound up while making adjustments. The tires move in/ out in "width" when the suspension moves, so if you are on solid pavement/ concrete, it can "bind" and not 'settle' to it's natural point. This would make any adjustments inaccurate

If you are going to this much trouble, and if you have no idea or even suspect that the front end is quite worn, I would SERIOUSLY consider replacing the rubber bushings--upper arms, lower arms, and the strut rod bushings