There is not much to "adjust" with an adjustable LCA. You can't make any real changes in the pinion angle.... not on a torque arm suspension. I used mine to move the rear axle assembly back 1/4" to get some extra clearance at the front of the fender for 28" slicks.
As far as the LCA relo brackets, for straight line traction they will help whether your car is lowered or not. My car sits about 1/2" higher in back because of the Eibach Drag Launch springs, and adding the Spohn relo brackets made a huge improvement in traction. Completely eliminated wheel hop.
