I put Roush springs & KYB struts on a while back and did measurements before and after (a few days after to let them settle). The drop was 7/8" all around. I can fit 1 finger on top of the back tires and 3 in the front - looks perfect to me.

Black 98.5 SVT w/ KKM intake, 73mm MAF, ASP pulley, Optimized stock Y-Pipe, 24mm hollow rear sway bar, Magnaflow resonator, Magnaflow mufflers, Roush springs, KYB struts