I believe Greg to be correct in stating A12 cars built as Y07 for Canadian specs would not have left Lynch Road with a Chryco radio.
However if you had a radio malfunction in Canada, your dealer would get a brand new Chryco radio like this NOS 70 B-body radio delivered in one of these boxes. These radios were Made in Canada (see on radio) by Phillips (on label) in Toronto up until about 1984. I could be wrong but I think Phillips made the majority of Canadian radios and Bendix manufactured the US radios