Jeff... Those Carter Fuel 6 cyl. Fuel pumps look "too new" to be originals...
Just my observation.... They look more like "Replacements"....which is pretty much the norm nowadays....(and post '67).. If you notice...The Spark Plug wires aren't Originals either
Most were daily drivers or in yards. At least two were (likely have more examples) reported unrestored car - reason so many of the normal wear items are replaced in the pictures
On the unrestored cars that I have pictures of all have Carters without fuel filters installed. On many of the others - they appear to have non-Carter fuel pumps and that would match the pattern of other aftermarket/replacement parts such as spark plug wires as well as other "common wear parts:
Have a number of NOS pumps around. Had a full case of fuel pumps I got many years ago. Guess I should check the dates on them since that would likely be the "smoking gun"
So if anyone has a Carter 6 cylinder fuel pump with a 65 date (or very early 66 one) now would be the time to post it to help the discussion