Saw that one when they brought some of the GM collection to the Trans Am Nationals a couple of years ago. Nicely made, but yeah....why? The Kammback was built by Pininfarina I believe, the glass side windows open butterfly fashion. This car originally had a 78 style nose before being changed to the 79 nose. There was another built, but I understand GM destroyed it. There was another 3rd or 4th gen built, but it was just a custom hatch....no body mods that I'm aware of.