er no, i think you'll find that the datsun 240Z was mainly an in house design...... although popularly credited to Goertz, he was only involved at the very early stages....... so the 2000GT is actually the only completely foreign design....
Ill grant that american technology is light years behind the europeans, but that again is because their country is MASSIVE, not all roads are great, and fuel quality is comparatively poor, so the cars have to be rugged and simple.... theires no denying that a 60's Alfa or Lancia was on a different level altogether when it came to technology, but ask them to put up with the duty cycle that the average american car went through, and they wouldn't last a month!!!!
and as for the Vette's engine.... yes it is a technological joke when compared to, say an F430's Motor, BUT that old pushrod lump can last for hundreds of thousands of hard driven miles, even with NO care..... try doing THAT to a quad cam, 40 valve, 9000 Redlined italian V8.... and it still delivers 400 + horses innit?
Im a europhile myself (I CHOSE a peugeot after all... knowing full well about the quirks), but i don't believe that great cars came ONLY from europe......