I agree previous posts: Check with Jerry, post trim tag picture. I can already see a number of things that are not correct under the hood. Also, another telltale sign is the presence or lack of the exhaust hanger plate on driver side rear frame in the wheel well. If it's missing, the car was not an original dual exhaust car. Finally, you are correct that non-RS Camaros had the silver grille (except for Cortez Silver cars, perhaps?).
