I'm only on for a few moments (see other post), but here's the link that may help...
http://gmcanada.com/english/maintena...arts_vint.html
With the suspicious body tag, obviously you need you confirm the Vin belongs with the car before going any further (especially investing money into the car) but if the Vin is good and for the minimal fee it costs, shoot the Vin to GM Canada Vintage Services as they can document I believe most '77 and up Camaros including U.S. cars!.
~ Pete