I can only ad I have run four 10 and 11'pickup campers(The older model campers) on a couple 3/4 ton trucks with the old 750-16 tires in both 8 and 10 ply without ever having an issue on terrible mountain roads that would shake the teeth right out of your mouth.
This new RV weight thing has boggled my mind every since I got a computer.In the old days we just did it and modified the truck to handle it,if need be.
Weight seems to be in about every topic including some I post, because it's what's in on the internet.(grin)
To the op...I would take that new F-350 srw and put that 855s on it without any worries as long as you have good tires.That's more truck than I have ever had for a truck camper/trailer or fifth wheel, until now.
