Can you convert f250 to a f350 dually?

Yes, you can convert a Ford F-250 to an F-350 dually, but it requires significant modifications. You'll need to replace the rear axle with a dually axle, install wider fenders to accommodate the dual tires, and possibly upgrade the suspension to handle the additional weight. It's also important to consider any necessary changes to the vehicle's braking system and ensure that the modifications comply with local regulations.