Wee bit over weight

Yes, my current tires are rated at 3750 lbs per tire at 80psi. I will probably get new tires next spring.

This 8060lb rear axle weight is a prime example of why dual rears or 19.5" wheels and tires are necessary when hauling a heavy truck camper.

Xpd77, you are probably still under your F350's rear axle capacity, which is good… and there are suspension upgrades that can help with ride quality and leveling. However, you are well over the rear tires maximum rated capacity. To make matters worse, I am not aware of any load range E tire that can meet your need.

Since you asked for thoughts from the weight police, here's mine; Next spring is far too long to wait! You need to think very seriously about the fact that you are exceeding your tire load rating! The way I see it you have two options;
A) Replace your current truck with a dually (I s'pose a dually axle/wheel swap is also possible)
B) Replace your tires & wheels with 19.5's with a load rating of G or H

And finally, until such time a you do have an appropriate truck and/or tires, I would suggest that you increase your tire pressure to 85psi cold, and keep your speed low (hint: Michelin's Truck Tire Data Book claims that at speeds below 40mph, you gain an additional 9% load capacity).

Cheers
-Mark