A rule permitting entry of nonconforming motor vehicles for purposes of show or
display became effective on August 13, 1999. If you wish to import a vehicle for
show or display, you must apply to NHTSA for permission to do so and establish
that the vehicle is of such historical or technological significance that it is in the
public interest to show or display the vehicle in the United States.
The 1983 Robin Hood S7 was not approved for Show or Display. Its pretty easy to see why this car was not approved, its a kit car, based on a Lotus Super 7. Not a production car, who knows how many made. Not technologically significant. However, this car is now over 25 years old so it is NHTSA/DOT exempt, and over 21 years old its EPA exempt. It is a kit car, so it might fall into some odd areas of the law, so check before importing.