I'm reposting too:
Well, here's a big surprise. I think it's a clever fake.
It looks like something someone handy put together in his garage from bits he had lying around including the air filter assembly from a 1968 Ford
Fairlaine.
What clinches it for me is that it's always seen with trees and bushes at one edge of it, which could be concealing wires holding it up.
It's a very clever model but I'm in no way convinced.