Gyraline looks promiesing. Please let us know what you think of it, if indeed you go that route.
I lowered my Limited, made my own rear camber link, toe and sway bar link. Front suspension has K-mac bushings on both legs of the A-frame. I continue to use toe boards and Longacre camber gauge/tool. Only once did I go the string around the car thing; a lot of work for little gain.
When you install the new ground control arms I suggest you remove and install one arm at a time; Don't disconnect anything other than the one arm you are working with. I also suggest you only swap the camber arm and the toe arms. If your car isn't lowered that is all you'll need to get the rear alignment where you need it. If it is lowered you will need to do the sway bar link also or the original will hit the camber arm. The trailing link and the track bar can probably be lift original, unless your bushings are shot.
If your car isn't lowered you could likely get away with just an eccentric bolt on the camber arm.
Good Luck and enjoy the ride!