Someone please explain this to me. The sticker on the door opening says never exceed combined people, and cargo 2743 pounds, the gross of the truck is 9900 pounds, the rear axle is I think 6900 pounds, the tires are rated at 3750 each. It's a 3500 long bed SRW, with a 48RE trans. I want to get a 5th wheel soon, I would like something in the 35 foot range, it will have somewhere in the 3000 pound hitch weight, I think, plus the 70 gal fuel bed tank I have, 3 people etc, it looks like this truck won't work, or do the rating numbers mean nothing? What in the real world can this truck tow, I am very confused, thanks