Sagging rear end

So my old leafs were sagged out, about a 2 inch difference from tire to fender vs the front. shop offered to put on some 2016 leafs with 1200 miles on them for a reasonable price. finished up and 6 hours later they already look almost flat. empty bed no off road bumper or anything. im really confused and not sure where to go from here. it has a 2 1/2 inch block in the back. 6inch procomp lift with the black series coilovers on the front. any help would be appreciated.

 

Dakar,or Ome rear leaf pack is the only way too go.Forget the cheap factory junk leafs

 

I like the adjustability of air bags, but I haul heavy chit from time to time.

 

Think about this, if you go up 6" in the front and 2" of the back, you are shifting more weight to the back springs.

Blocks are the worst, will fatigue the crappy springs faster. I went with Alcan's; they're decent, but I think I wish I had done something different.

Also if you have the tools and mechanical inclination, save yourself some money and install them yourself next time, its about a 3 hour job, but not difficult.