Ok, So I have a 2011 F150 Platinum Super Crew Tow value of 7700 LB. 5.5 foot bed, 5.0 engine 4x4 2 inch leveling kit with 35x12.50x20 10 ply tires. I am thinking of purchasing a Jayco 29RLS that is ...
Forget about the ratings. The 35" tires make them meaningless. Those tires make the truck look tough, but as far as towing goes, make it a weakling. It is not just the power aspect. Oversize tires put additional strain on many components... If not pushing the truck, then it may be OK,,, But towing on top of that is not a good idea.
And it is pretty much impossible to estimate just what your truck is capable of as it sits now.