That's a great photo! Thanks for posting it.
And, yeah, that looks like a 1946-48 Chevy Fleetline, so it is definitely a post-war photo. Perhaps if one knew when the Canadian Tire store moved from that location we would be able to pinpoint the year a little more closely.
Looking at that pic (and the one that JET posted the link to at the Herald), the buildings don't look so bad to me - kind of a shame that it was sterilized to build Cogswell, as it looks like a neat neighborhood. Makes me wonder what it would be like today had it been allowed to evolve naturally, rather than be razed by the government...