I have been a long time Chrysler enthusiast. It probably is a re-badged Sunbeam or maybe even a Jensen. The Canadian cars were different than the American cars until the late 70's.

You can use the Ofna hexes, that is what I am using.
I haven't really heard anything bad about Ace. My LHS had the parts in stock so I didn't have to order them.

You should order an extra set of the diff cups because if you shorten them to much they will not work. Its kind of a pain but go slow with the shortening and trial fit several times to make sure that you get the right length.

rolland