Welcome to CHR! Looks like you're diving into a big project!

As I recall, the DJ's are "Dispatch Jeep's", which are all 2WD variants of the CJ line, mainly built for the post office and other urban uses that benefited from the rugged Jeep heritage, but did not have need for the 4WD all terrain features. Sound right? Lots were built with the square body, sliding door feature used by postal delivery people - last forever, easy in & out. Lots were right side steering too, weren't they?