You can see my factory originals.... the bar is perfectly level. You can see what I replaced them with.... the bar is perfectly level. True, my stockers only had about 60K miles on them when removed. The holes on the lower A-arm run front to back. There is no reason for the t-bar to be anything but level. As the A-arm goes up and down, the t-bar just has to rotate about its axis. Any minor relative movement at the top of the shock is easily absorbed by rubber bushing in the bottom eye.
If you put a level across the two holes in the lower A-arm, is it level, or tilted?
Every photo of the Stagg shocks I found on the web shows the t-bar level.
I really think that all you need to do is bolt them to the lower A-arm, and tighten both bolts down slowly and evenly to pull the t-bar back to level.