When I was in high school, a kid at our brother school drove a '57 Chevy, complete with fuzzy dice. It was very cool, and is probably the only reason I still remember that kid's name today.
However, this urban legend about a secret group of GM employees furtively producing '57 Chevys on their own is untrue. It's a shame it's made up, because can't you just see the movie now?
Also, if you're a fan of 1950s cars, there are some wicked commemorative stamps you should check out.