Well, I'm not sure interesting is the best description!
True, much of it won't apply, but if it's even close to a complete car with a VIN, the border will still treat it like a vehicle import, thus requiring the paperwork 3 days in advance, proof of clear title, bill of sale, etc. Even if the car's not running, it's still a car.
But it does make me wonder where the line is drawn as to what constitutes a complete vehicle, as opposed to a pile of parts. My guess would be a chassis, as that's what carries the VIN, but I don't know.