I think this has been talked about thoroughly.. but I still think it's possible. Not that I have the money to do it... but...
The US gov't says that you can import any car from Canada that was manufactured before sept 1, 89.
http://www.nhtsa.dot.gov/cars/....html
I know that in Canada they can import any car that's more than 15 years old.
http://www.jns-imports.com/importinfo/index.html
So if you could get someone in Canada to pick up an 89 GTR and have it shipped and registered in Canada.... Could you, once it's registered in Canada... bring it here to the states?
Now, I am sure you would have emissions issues in some local areas, and likely it would be a pain to get it all registered.. but I bet it could be pulled off now.
Anybody see a problem with this theory??? I am not sure if the US import rules check back a car's history before canadian registration is done? Hopefully they see Canadian registration and don't pursue it further.