I have the same exact problem with my '90GT hatchback, my driver side, especially in the rear of the car is like stated above 1-1.5 inches; i thought it was the old, stock springs that were on the car, i measured it in my garage on a well leveled surface...from the ground up to the fender and it was off by 1.5inches...
This made me so pissed because it's impossible to fix, i swapped the springs out to brand new pro eibach springs in the front and the rear and as soon as i lowered it back to the ground, it had done absolutely nothing and it was still leaning to one side...SO WHAT next???
My buddy George from this one shop told me to put a spacer on the driver side, it is just a spring spacer which is just simply placed on top of the spring, its rubber and it definitely helped the LEAN of the car, BUT it's still not completely the way i want it to be b/c it's still a 0.5inch off.....
ANYONEEEEEEE? ? ?
Stan