I will keep an eye out... BTW, excellent use of pictures to help me identify the right stuff. One more thing, JIC I have not learned to appreciate all the details of a particular model... something like this may help me identify a heap the is difficult to access...In case you find these 2 small things for a 1965/1966 New Yorker...
The map light switch assembly for the cars equipped with power antenna (mounted on the rear): it has a second switch, for the antenna (left side).
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And the Safeguard Sentinel dash sensor cap, or the whole sensor with its cap. As far as I can tell, it spreads several years, not specific to 1965/1966.
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I have learned what to look for in those 66 300 tail lamp assemblies after a few practice swings with @Dobalovr and now know what a high demand part they are if I trip over any, I'm throwing a "note to self" picture in here...