Hey Ryan,
I have had Eibach's on my 1991 for three years now. I have stock 15/16's absolutely no rubbing at all.
I run the car in a spirited manner, so I have compressed the suspension fully, and have even hit the bump stops a few times, no rubbing.
The car came down about an 1" as is described about these springs. My car has 30K miles and original OEM shocks.
A while ago there was a thread about POSSIBLY a bad batch of Eibach's. I have not substantiated that, so I do not want to start or extend a rumor, but I recall it about a year ago or less.
Are you running stock shocks? If you have installed Bilstiens, and used the lower perch I would think you are down about 2".
Just grasping here.
HTH,
LarryB