That was the same month they were building some of the last 72 models. They started 73 models at the usual time during August, but then skipped back to 72’s before continuing the 73’s.
By all means head over to Viperwolf1’s thread on “mind your P’s and Q’s“ thread.
Sorry, I don’t have a link at the moment, but someone will. It also comes up fairly quickly in searches.
You can add your information to the database as well.
Such as, did it have a fuel return line at the carburetor, or did it have the ambient switch in the door panel, or did it have light bars on the dash, and 73 smog related stuff under the hood. The answer is most likely, yes to most of those, but you also have the T-handle.
Interesting to look at the data plate on the transfer case to see if it’s was built the same month, or so. Rather than sometime earlier.
A much earlier build date/serial number on the transfer case would mean most likely that someone has swapped it in.