After seeing your pictures, if I were you, I would source what is needed to put the deluxe door panels back.
Your pictures do prove that those doors were originally Deluxe Doors (clips are even present for the center pull-pockets...earlier I mentioned "holes", but the clips are where those pockets attach).
Yes, the speaker holes were added in, those holes are not cut the way Ford typically cut the holes.
The door, inside as well, has been re-painted. Paint overspray onto many items, so not as Ford did it (and looks to not be a Ford interior color.
IMHO, I would estimate the door sheet metal ought to be about 10-15 days prior to actual build date so the dates may be questionable, just saying. Jeff might have more info about that subject than I would. Sometimes there are strikes and plant shut-downs that move dates back a little but I am unaware of anything that might justify a long reach of over 2-months for an early January 1967 built car.
You might take note of other various dates of sheet metal around the car. Years ago, the bolt-on parts were often changed for even the smallest amount of damage since there were so, so many around in salvage yards for many years. You might take notes on dates found in the unibody construction to get you a 'closer to typical' average date, a date that would be similar to what you would expect to also find on your doors. I have found the span of dates typically found on a car with all of it's original sheet metal are within a few weeks of the oldes date to the newest date and generally precede the ACTUAL build date by a week to 3 weeks at most. Usually the dates that are the furthest away from the actual build date are items like brackets and small sheet stampings, not items like fenders, doors, hoods and such.