Thanks for the reply. Issue isn't height but ride quality. I used to tow and haul a lot of weight 5-8 years back and added an add-a-leaf to the truck. When a main leaf broke in '05 I had a spring shop put in an add-a-leaf on the new spring pack, which ended up being considerably stiffer from what I had added. This was great when hauling a lot but sucks now that I don't as often. Problem is I can't remember if the original leaf pack had an overload spring and it was just removed or if it never had one. The current setup creates an extremely rough ride unless I have over 500 lbs in the bed, in addition to my camper top. Thing doesn't even get level until about that weight.
I will probably just take out the add-a-leaf and see if I can get an OEM overload spring. First though is passing emissions next month.