I was told this many years ago by a knowledgeable Mopar guy, but just haven't physically verified it yet.

The chrome plated vent window frames, (wing windows) from the 1966 & 1967 B-Body 4-door cars, are the same part as the 1968 to 1970 B-Body convertible vent window frames. The 1968 to 1970 2-door hardtops & coupes are different than the convertibles, but the older 4-door cars are supposed to be a match to the convertibles.

A good friend of mine has the parts so we may try this soon. Just comparing the doors side by side, the window frames look the same.