Fantastic. Many thanks for all this valuable information, Eaglescout526! I have of course started to check the truck to see what items on it that has been changed over the years. Most of the items on the list seem to correspond with how the truck is equipped today. This far I have only found one item, "JAY-Instrument cluster with tach", that differs. I have the "giant fuel gauge" version of the instrument cluster.
Harry Karlsson was the Swedish AMC/Chrysler importer between 1971 and 1999 and sold more or less all of the Jeeps in Sweden in that period (but there was a also a lot of private imports). Karlsson also sold a lot of vehicles to the armed forces and the Police, among others 450 J20s to the Swedish Air Force.
A Swedish Air Force J20.