I have a little bit to add. The nomenclature of 100 150 200 250, were not available in the same years. 100, 200, 300 were altogether. Likewise 150,250,350.
The D150 came out in 77. The D100 didn't end until 1989 but there were a few years in between that didn't have a D100.
1970 Dodge d100/eventually going on a 77 D100 frame
