+1 make it simple :smoke:

I added airbags on the rear and it seemed to fix the problem for me. haha easy plus you can level your truck if you are packin some wieght. Just a thought for ya. The picture on here has the them about 45% full. I can air them up to 100 psi.
http://members.cox.net/boom831/DSC00021.JPG

I used a 3" Block & a helper spring with a shim kit from pro comp sits a 1/4 higher in the back than front now. the shim kit has 4 1/4" shims so you can go from 1/4" to 1" I used 3...........The kit comes with new bolts for the spring pack so the shims bolts dirrectly to the springs.
https://www.f150online.com/galleries...072-202623.jpg