I actually just did an overland RV conversion on an F550. Here are the requirements from the Canadian Motor vehicle safety regulations. I also found out that you need a serial number(VIN) for the Chassis and one for the conversion. You need to go through the Alberta process (Link below) to get a VIN assigned to the camper/living part,
motor home: means a multi-purpose passenger vehicle that is designed to provide temporary residential accommodations, as evidenced by the presence of at least four of the following:
(a) cooking facilities,
(b) a refrigerator or ice box,
(c) a self-contained toilet,
(d) a heating or air-conditioning system that can function independently of the vehicle engine,
(e) a potable water supply system that includes a faucet and sink, and
(f) a separate 110- to 125-V electric power supply or an LP gas supply; (autocaravane)
Getting a VIN in AB:
https://www.alberta.ca/vehicle-ident...ory%20holidays.