You've got me there, Rob.
I have "D43" as a model code for a 1953 Dodge with a 228 cu in but nothing under WW2 Canadian either as civilian or built for the military.
I have some wartime DD and DE codes for US-built trucks sold as DeSoto, and some DD codes for wartime Canadian-built trucks with Dodge badges some of which ended up with Commonwealth forces.
Got a chassis number?
Gordon
PS, sorry if the other Gordon has been bending your ear about an APT article - I said you were the only one who knew anything about them.