That Canadian engine number only means that the engine is Canadian, IMO.
By the time one of these cars reaches this age, there is a BIG chance that the engine has been changed at some time so the car may not be Canadian. Canadian cars had other differences not seen on American ones. My memory is a bit sketchy but I'm sure if I'm wrong, someone will correct me but the Canadian cars had holes in the chassis to take a RHD steering box and no number stamped on the chassis. Also, if there are any of the original screws still on the car, the Canadian ones used Robertson head screws whereas the American ones used slotted heads.
Hope that helps.