67 only, Coronet only.
66 is different and is 66 only, Coronet only as well.
66 is raised in the middle of the letters, 67 is recessed.
They interchange, though.
Careful- the middle "D" is different than the fist "D" and the middle one is prone to breaking and is frequently switched out.
Make sure it has the recess for the crown in the center of the hood.
There are similar sets used on other car models but they do not interchange as the pins don't line up.
Both years are very prone to pitting and finding a nice set is a challenge, and can be pricey.
Ebay link above is not correct for either 66 or 67 Coronet hood.
Probably not what you wanted to hear, but it's the truth.