My truck is the same as yours except I have the 6.0 gas engine. My camper as you can see is a Wolf Creek 816 which is a bit lighter than yours. Everything depends on how it is loaded as to final weight. I installed Timbrens first which help a lot as the timbrens ride on the axle when you are loaded and give much more suppofrt that your OEM stops. I then installed Torklift Stableloads which really brought the rearend up 2.5 inches. My Stableloads are quick release so you can disengage them when not loaded. I also installed Bilstein rear shocks. They are BE5-A831-HO which are specially made for hauling acamper. They were $168.00 at
ESHOCKS Hope this helps.