85 TC coil springs?

I pulled a set of coil springs from a 1985 TurboCoupe and was wondering what spring rate they are if anyone knew? They look really beefy and the car looked like it sat lower than non turbocoupe ones. I'd like too put these spring on my 88 mustang GT. Any info would be of great help.

They are the same spring rate as the springs in your GT. The load rating is going to be higher though and they may cause the car to sit a bit higher, esp in the back.