It sounds like you need a bigger truck.
I would never purposely buy a rig that I knew was overloaded. My state does not allow me to plate for more than GVWR, so I would be risking a ticket or worse.
If somehow I thought it was a good idea to do it, I certainly wouldn't post on the Internet and remove all doubt that I was aware the rig was overloaded.
I understand the sentiment that 19.5 tires, bigger brakes, etc., certainly make it a "safer" option. Shame on Ford for underrating their F-450 class vehicles. That said, we have a responsibility to other people on the road to operate them within their ratings.
There will be a day in my lifetime when RVs have to go through weigh stations and be inspected. The present lack of enforcement has resulted in an entire industry of unsafe and overloaded vehicles. Just look at motorhomes or larger 5th wheels if you need examples; the tires and axles barely have sufficient capacity to carry the empty campers, much less any cargo. The day will come when there is a high profile accident and that will be the end of this under enforcement. There are certainly commercial vehicle operators that have a much larger margin of safety than RVers, yet they have to go through the formalities.
You have the opportunity to buy a truck that is rated for the load you want to carry. Certainly you have the money to do so if you ordered a new camper and truck at the same time. Don't risk it.
