Gorries of Toronto sold black-on-gold Camaros with gold accents, called "Black Panther". Some of these cars had 427ci motors installed by the dealer. Here are some pictures of a small block Black Panther car restored by the origninal owner:
If your car was sold new in Canada, you can get a bulid sheet from GM of Canada. It won't cost you anything to find out if they have it in their records. Call George Zapora at 905-440-7636. If it turns out you have a car sold out of Gorries in Toronto, chances are you might've stumbled onto a very rare beast indeed.