Scott,
Only the B&G are progressive, I didn't want ST as they are pretty stiff. My only choice was to cut a coil in the rear and use a thicker spring pad. Car handles fine. I am going to put a 22mm e12 front stabilizer bar on the coupe and remove the standard 17mm bar. And a rear e12 bar is same as coupe and will fit my NK which has no rear bar so it will get the e12 bar. So now I have used front springs and new rear B&G springs in the garage. I finally have most of Murray's stuff sold and now I need to clean out my own junk.
Chris