I think the shim is the next thing to try,I have tryed to jack it over and over that is as far back as i could get it.Bummer have to pull everything apart.Do they make the shim,or do I have to make them,if how, how thick 2'' 3'' 1/2''.
You are limited on the shim thickness. The studs on the front perch are about 1 1/4" long. I used a 3/8" aluminum shim. If you make the shim too thick you won't have enough threads left for the nut. This is critical!! You wouldn't want your spring to come loose while you're driving around.
You have to use the same thickness shim on both sides to keep the rear end square to the body.