They are the exact same grille. The only difference between 64.5 and 65 was in 64 the cars had a generator and in 65 they had an alternator (the Idiot Light reflected this by saying either GEN or ALT).
My 64.5 has a smoke gray colored honeycomb grille and my 65 had a black honeycomb grille, they were identical except for the color, not sure it that was factory or if someone repainted one over the years.
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