Flathead engine assessment

[4RD289mT]

I recently bought this '47 that has been partially restored, however the engine (and maybe the trany) need some attention. Since the previous owner passed away the records are not real robust. I need some advice on how to assess the health of the engine and/or what books or websites to look at.
Also, does anyone know about the "made in Canada" and other nomenclature on the engine head? Does anyone know what the numbers mean on the head? Any help would be appreciated. Thanks.