What size is the fuel tank on a 2007 Ford F-350 crew cab short box super duty truck?

The fuel tank size on a 2007 Ford F-350 Crew Cab Short Box Super Duty varies depending on the engine and configuration. It could be either 32 gallons or 40 gallons. There's no single definitive answer without knowing the specific trim level and options of the truck. To know for sure, you'd need to check the vehicle's documentation (owner's manual) or look at the fuel tank sticker (often located inside the driver's side doorjamb).