Wagon Rear Springs

I have new control arms for the rear of my 94RMW and want to replace the springs at the same time. The air ride works fine and I want to keep it. Are springs for the Gran Touring suspension and Dynaride the same? I'm assuming wagon springs are different from sedan, right? Will Caprice springs work? I was initially attracted to the Moog Cargo Springs as someone suggested but I'm afraid they will ride too hard. I need this car like a hole in the head and don't really anticipate hauling anything in it. Does anyone have a part# (Moog or otherwise) and a good source? Thanks.

Swapping rear springs is so easy, there's no reason you should replace them now with the control arms. Just do the arms, and do the springs later. Yes, sedan springs will work.