Removing the isolators on the springs will lower the car a tad. It really depends on the condition of them. If they are not crushed you will see ~.250" drop.
If you can spare ~$150 get a set of SR lowering springs. They drop the car 1.5" and you really won't need anything else. Alignment shop was able to get my Mach 1 into spec with them in without plates.
Two other options though not highly recommended (by me anyways) would be to cut springs or throw on a tire with a larger sidewall ratio.
12 Black GT500 SVT PP l VMP TVS l JLT123 l O/R X l 28x11.50Rx15 M/T Street R's l BMR Suspension l Recaros
03 Sonic Blue 3.8 / 17 Magnetic Fusion Sport 2.7 EB