Has factory equipment (wipers, horn, heater), ability to drive distances and idle for extended period of times and has plates.

With the distance provision I'd imagine pump gas would be a requirement. Chute and wheelie bars? Why not as long as they don't interfere with operation.

I drove my GTX and Dart without heater trying to get the last bits of weight out that I could, not fun at all on the street when living in New England and I'm sure the DMV has a regulation stating a vehicle must have working defroster.

I also drove with fiberglass bumpers which was nerve wracking. These were not weekend toys but daily drivers back in the day.