[Synchro909]

That doesn't look like a factory stamp to me-more like it was done in someone's back yard. My understanding of Canadian engine numbering is that they start with a "C", then a number similar to what was used in the US. Eg, CA XXXX but the cars that came here had three letters before four digits. CAD XXXX, CAQ XXXX etc.
I've never seen or heard of a number like the one on that engine.