1972 Fender extensions with a 1971 Grille

Thanks for the reply Oldmanmopar. It's obvious you know your stuff. I have a set of deep fibreglass, but one of my chrome trim pieces has some scratches on it. I think I'll keep the '72's in the meantime, and source out a clean trim piece to replace my scratched one on the deep extension. When I get that far into my build, I guess I'll experiment. Thanks again. I appreciate your experience.