There was an engine difference too. I believe the Canadian 216s retained the domed piston design until 1946 . That includes of course the old style head. That is reflected in the Canadian and US parts manuals.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!