Rear Spring Question

Hey guys. Got a great deal on some pro kits. The fronts are for my car, Problem is the rears are these

http://www.stangsuspension.com/store/comersus_viewitem.asp?idproduct=1344

And I have a 94 GT Coupe. I plan on getting MM adjustable rear lower control arms. So too to worried about the height if there is an issue there. But Are these gonna be softer or stiffer than the ones for the 94 GT coupe or the same? Im sure something is different because its for a vert fox and I have a coupe sn..... Really lost. I cant ever get ahold of Eibach. Please Let me know what you guys think. Thanks!

Well you dont think they will be any softer then say Sportlines would you? Here is the chart I think you were looking at. http://www.stangsuspension.com/store/springratesarticle.asp
It doesnt have the rates for coupes vs verts on the eibach pro kit. The only thing im worried about is that they are going to sit WAY too low or they are going to be insanely soft. I wont mind if they are soft enough to make me hook better lol. Not sure what is too soft though.