I have a lowered 99 4wd Escahoe

From towing and bottoming out the rear I got lil hump in the trunk area EKK!

At most I do 2,000 LBS

Questions...

My buddy has bags laying around they he never installed when he was going to bag his truck. Will these work or will I need to get special heavy duty bags like the one's in the FIRESTONE KIT?

My truck is currently dropped with hangers and leaf spring. I want to go even lower with 2in hangers and a notch. Will the Firestone bags even work in such a low application?