I know F-450 orders don’t follow the normal scheduling process so either your dealer has no allocation or there is some commodity issue on your specific truck or some other issue between the dealer and Ford.
As for Facebook guy, that sounds like BS. As far as I know nobody at the factory has any control over scheduling. Maybe he just has a good dealer connection with lots of allocation, but I have a hard time believing he can get a 450 in 6 weeks under any circumstance.