Does anyone have the dimmensions of the springs for the GC setup. I am pretty sure the inside diameter is 2.5" but how about the unloaded lengths?

Reason being, I have a cheapy coilover setup on my 1G right now that was designed for a 5th gen Prelude. The ride is harsh, but my concern is that the rear springs are 9" long and even at the lowest setting the car sits just under the stock height. I wouldn't even want to guess the rates, but they are probably around 500.

Long story short, I need to replace the rear springs, but I need the length. I am considering getting them from here http://www.mmrusa.com/s2springs.htm

Any help is appreciated.