The C grille may be the same as a B (except for the emblem screw holes on the front. The bottom edges of each of these grilles is shaped to fit the steering gear. The A grille is trimmed considerably different than one for a B or C.
Cand B grill will inter change other than th afore-mentioned emblem screws, are the same height as an A grill,, however a Super C grill is 1 1/2 " taller.