hello i need some answers please

No, this is not original or rare. A previous owner has replaced the Barracuda grille with what he could find. Doesn't look bad, in fact I like the look, but it is a Valiant grille. When you start looking for a nice '66 Barracuda grille you'll appreciate what you have. Personally, I wouldn't bother such a nice looking car. Most folks won't know if you don't tell them.