Greetings,
I see you live in Oregon so weigh stations are sprinkled all over the state on major highways. Even the closed ones still work. I use the one Near Banks Oregon off of HWY26.
I can pass on my experience although the years and numbers are a bit different. Here I have a 2014 9.6QSE recently mounted on a 2017 F250SD. The weigh stations are your FRIENDS here as without them I would not know that my 2017 is heavier than my old 1997 it replaced and that my 2017 rear end weighs 3000lbs EMPTY and 6400lbs with the camper (minus water, passenger and firewood). I'm currently rolling 11200lbs on a 10,000GVWR truck.
The rear tires on my F250 are 18" rated at 3450ea giving me 6900lbs of weight I can have on 80PSI tires. Given that with a passenger, full water and full firewood I ought to be rolling 12-13,000lbs I ordered the 19.5" rims to go with the 265/70R19.5 Toyo 608Z's (rated at 5500lbs@110PSI, overkill) that I have on the old 1997 truck.
A quick trip from Beaverton/Hillsboro to Seaside and back @ ~12.5MPG and clearly "top heavy" (as expected), more pitch and roll than with the Toyo's for sure but not over the tire weight (just the truck for now) it drove decent enough that I can imagine the improvement with the Toyo's mounted.
I believe that with these modern trucks that the tires are the weakest link and a NL is going to weigh more sitting on your truck than it looks like on paper.
(from another NL and Ford owner)
Mark0.
