I have researched this information from Wikipedia page and found some discrepancies from the source and my memory and others.

The 1979 source is from the book that was published by the Postal service in 2022 which referenced with 1979 paint scheme: https://about.usps.com/publications/pub100.pdf

But my memory came out wee bit earlier than that. Possibility started in 1976 due to USA's Bicentennial anniversary that may have changed the colour scheme such as this: https://commons.wikimedia.org/wiki/File:American_revolution_bicentennial.svg

This refuted my memory: https://commons.wikimedia.org/wiki/File:Trolley_car_passing_downtown_Pittsburgh_- Kaufmann%27s_store,_1984.jpg with the 1976 version of DJ-5 Dispatcher as shown there.

Also, there https://imcdb.org/vehicle_564060-AM-General-DJ-5-Dispatcher-1977.html and https://imcdb.org/vehicle_759280-AM-General-DJ-5-Dispatcher-1977.html

Can anyone confirm my finding here?

https://imcdb.org/vehicle_1348169-Jeep-DJ-5-Dispatcher.html#Comment3580373
https://imcdb.org/vehicle_1820323-Jeep-DJ-5-Dispatcher-1965.html
https://imcdb.org/vehicle_35742-Jeep-DJ-5-Dispatcher-1967.html#Comment3580584
https://imcdb.org/vehicle_256785-Jeep-DJ-5-Dispatcher-1967.html#Comment3580375
https://imcdb.org/vehicle_228211-Jeep-DJ-5-Dispatcher-1969.html#Comment3580600
https://imcdb.org/vehicle_1228640-Jeep-DJ-5-Dispatcher-1971.html#Comment3580603
https://imcdb.org/vehicle_58779-AM-General-DJ-5-Dispatcher-1971.html#Comment3579979
https://imcdb.org/vehicle.php?id=308365#Comment3584407
https://imcdb.org/vehicle.php?id=561010#Comment3584408
https://imcdb.org/vehicle.php?id=764267#Comment3584409
https://imcdb.org/vehicle.php?id=1378259#Comment3584410
https://imcdb.org/vehicle.php?id=1384383#Comment3584412

I have gone through these DJ-5 Dispatcher vehicles at imcdb.org and found some vehicles have old sticking out of body gas cap and newer below the body gas cap insert at the rear

Our lively discussion at: http://imcdb.org/vehicle_831521-AM-General-DJ-5-Dispatcher.html
http://imcdb.org/vehicle_120291-Jeep-DJ-5-Dispatcher-1965.html

I have several Jeep/AM General DJ-5 Dispatcher picture in IMCDb listed in question. There are at least two diffrent front end for these DJ-5 Dispatcher in question. Which should these belong to:

AM General:
http://imcdb.org/vehicle_84670-AM-General-DJ-5-Dispatcher.html
http://imcdb.org/vehicle_331130-AM-General-DJ-5-Dispatcher-1971.html

Jeep:
http://imcdb.org/vehicle_480618-Jeep-DJ-5-Dispatcher.html
http://imcdb.org/vehicle_145254-Jeep-DJ-5-Dispatcher-1970.html

Comments are welcome here