I lowered my 97 GT with 2 inch eibach springs and the place i took it to be aligned said they couldn't line it up at all. But granted i didn't use the CC plates like i should have.
The only thing you are gonna need to watch it the wear on the inner tread of the tire in front. An allignment shop cannot correctly adjust the Caster/camber enough once the car is droped to compensate. Therefore you need them. Once you take your car to get alligned though, I would let them know that you have them, so they know to adjust
Thanks everybody. I haven't lowered the car just yet, but that is my next project for her. I have 17x9 bullitts in the front with 275/40's and 17x10.5's in the rear with 315/35's, and I'm looking for a good 2 inch drop.