And in Canada the 1966 Polara taillamps were on the Polara (L), Polara 440 (M), and Polara 880 (H), with Monaco taillamps on the Monaco (P). Makes sense.
For 1967 the Canadian series dropped a notch, so they were E, L, M, and H. (US remained L, M, H, P) But the taillamps were distributed the same as in 1966 - E, L, M with Polara lenses and H with Monaco. But in Canada the series names were adjusted - Polara (E), Polara 500 (L), Monaco (M) and Monaco 500 (H). So the Canadian 1967 Monaco has Polara taillamps and the Monaco 500 came with Monaco units.
But you can tell a Canadian 1967 C body Dodge from the American original by the base engine code in the model number. American Dodges, 383 V8 base engine, were model CD2-, while the 6 cylinder Canadian Dodges were CD1-, and the Canadian V8 models (318 base engine) were CD3-.