Obviously, it might not work for everyone and their specific 4Runner set up. I really wanted to level the vehicle and I was already 2" high in the rear compared to the front and I knew that the new FJ 4x4 springs (from MOOG) that I was going to put on would give me even more lift in the rear.
I don't understand how you got 2.5 inches of rear lift. I guess the Moog springs aren't really all that equivalent to the OEM FJ 4x4 springs.
Also, with a 4" lift up front did you have to upgrade UCAs to get a reasonable alignment?