sitting high??

How new are they? It's possible (unlikely, but possible) they need to settle.
What about your control arm bushings...how old are they? If new, did you tighten them before the car loaded the suspension? Are they for a 94 & up, not the 87-93?

If all is correct, settled in place, may be time for lowering springs. I personally have Bullitt springs on my 88, I really like the ride height and quality...
 
Springs are what effects ride hide, not shocks/struts.

You already have lowering springs on there?

The end of the springs are suppose to sit in the perch a certain way, which could also be your problem.
 
-Drag setup?
-Compressed heigth of the strut is incorrect?
-Control arm to k-member bolts tightened when suspension was hanging?
-Factory type springs and the car has been lightened drastically up front?
-Spring not properly in it's nesting area on the control arm?
-Body in the trunk?
-Someone put truck springs in it?
-The spring isolators are too thick?
-You measured it with the cm side of the ruler?
-Blocks in the springs?
-Blocks not in the springs?
-WTF?