They are being used with good success as a rear spring for the drag strip. Both guys I know who run them in the rear, run coilovers in the front. I think I need to find a set for my car too. I was watching my dragrace vids from NMRA this weekend. One one run I unloaded the rear tires on my 1-2 shift to the point that I laid down 10 feet of black marks, which was visible in the video taken from the stands. My rear springs are aftermarket, and too soft. I think the stocker V8 springs would work well.
Joe