towing ford f-150
This is actually 2 questions. First of all you need to insure that it will not cause you to exceed the GCVW (maximum weight of motorhome and trailer) or Gross vehicle weight or Gross Rear Axel weight of the motorhome. In order to help you with this, we'll need to know information about the motorhome.
The second question is can the truck be towed without damage. It is my understanding that pretty much any vehicle with manual transmission can be towed without danger, but you'd want to check that your truck is not one of the exceptions. A follow on question is whether the odometer of the truck will advance while it is being towed.
Note that there are a few modifications you will probably want to consider. One is the installation of a tow bar, the best way to attach a 'toad' to your RV. And of course, the wiring so that the truck lights are controlled from the motorhome. Another is the installation of an auxillary braking system, so that the truck brakes help stop this caravan. And finally, some sort of shield to protect the front of the truck from the crap thrown up by the RV wheels.