ride height Options

[SCCA Stang]

I went to that alignment shop a couple of weeks ago after some front end work was done and the setup my car to specs.... after that the car was definately better, but pulled a little to the left.... I thought that I could live with it, but finally decided that I could not.
so, today returned to the alignment shop and put the car back on the rack to find that the car's measurements have not changed that much, but we re-set the car up and I drove it.... it still pulls left, funny cause according to the measurements, it should pull right if any due to caster (unfortunately not adjustable)

so we started contemplating what was wrong and the tech measured the ride height from the ground to the center of the wheels well on the right side and got 23.5 inches
left side measured 22.75 inches

measured the rear and got similar results

how does the left side of my car sit 3/4 of an inch lower than the right???

I am thinking that possably I have a bad set of springs, they are Eibach prokit springs and non adjustable KYB GR-2 struts and shocks

any idea's???