I have 'em. Can't really tell you exactly how much the drop is. Look at the thread on Pacific Green Stangs from a few days ago and you'll see my pics. I removed the front isolator and cut the dead coil on the rear. It has some rake.
the drop is about an inch and a half. and they are a really smooth ride. i really like mine on the new car and i have ford racing b springs on the 03 and they are really good too. they are even smoother ride. it rides better than it did from factory. the b's are a little bit cheaper and not much different from the c's except better ride quality... i would go with the b's..... you can get them at stangsuspension.com they are priced really good too. heres the link to my 97 http://www.sn95forums.com/forum/index.php?topic=5591.0 and heres a couple pics of the03
C-springs are pretty good. I'd say I dropped about an inch, I'll be taking off the isolators as well. I like them because I didn't cost an arm and a leg. SORRY UPGRADING FORUMS, ATTACHMENT WAS ERASED, YOU NEED TO REUPLOAD!