Removing Firestone Work rites and installing air bags..

I have had good luck with the work rites,but I have a lot less weight and on the F150 they replace the bumpstops.
when
I store the camper the work rites are 1.5 inches above the axles,but it still rides like a truck because of the Monroe coil over shocks and my home made half stable loads.I didn't use any spacers with them