You are going to be cutting your weight pretty close bud, I have a 1116 Ultimate Suite that weights 5000lb. completely dry. Don’t know what your deck weights, but whatever you put into that camper for weight (Propane, Water, food, beading, clothing and camping gear) is going to be how much you are going to be over. Just Saying, I had mine on a 95 3500 crew cab pickup box for 4 years with the diesel, it handled it OK but I was always worried about the weight. Went to a F350 in 99 was pretty close, then purchased a big boat…that put me way over again(stupid Boat) Have it all on a 2008 F550 now with no problems?.
Good Luck
Wes