I have a 1971 'cuda that I am restoring. The car was originally painted GK6. When I got it 20+ years ago it had an original paint argent grille in it, but I don't know if the grille is original to the car. Car has a mid-April 1971 build date. I'm trying to determine if the car should have a body color grille or an argent grille? Only have pieces of the buildsheet.