1987 R1500 2wd Rear helper springs?

[jesdude7789]

I know you can get them for newer trucks but I was hoping to find some kind of air bag helper springs that install between the rear leafs and frame?? This truck is completely stock.

I just have found helper leaf springs (add-a-leaf kits) but I don't know If I want those since I can't adjust the ride quality. But then again, I 've never owned anything with these so I don't know what to expect.