Not sure why everyone is so focused on flat towing, the OP was questioning towing capacity of the RV to pull a trailer. From what I have learned over years of doing this, is modifiying the rear most frame section. Alot of RV's have real cheesy frame extensions, some are down right dangerous just supporting the living qtrs. Reinforcing the sections with plates, boxing the inside, and building a strong hitch with big side plates and gussets, are where we start. We just got a '95 class C gulfstream, one reason we bought it was how good the rear frame was made from the factory, should be easy to modify for towing the Bronco.