My car was built by Seduction and it had an Arizona title and vin number. I took the tilte to the DMV here in NC, and after an officer came out to the house to inspect it, they gave me a tag. All the officer was looking for, was that it was a real car and it wasn't stolen.
Our county does not require emission testing on anything.
The officer said that if my car hadn't already had a vin number on it, it would've been a long and involved process to get one for it.