Odd question here about a Canadian Dodge.  I'm in the process of having the engine in my '41 Plodge overhauled, and in the midst of it I've noticed that I seem to have a D21 engine, based on the stamped engine number on the block, even though the car itself is a D20 -- the lower-echelon model with less chrome trim on the body, simpler interior, etc.   I've got documentation on this car back to the original owner, and it's listed on all the documents as a D20 -- with a D21 engine. There doesn't