Not Ranked
No expert but...
As I understand it you can indeed register your car to the year of the engine block however, it will have to meet all the smog requirements for 1966. Granted there were not many but they do exist. I would be somewhat cautious of going that route. My Ca built 66 Mustang has a few items of smog control that came from the factory.
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We have enough youth. What we need is a fountain of common sense
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