I believe you are correct. I know that Ford and Mazda are closely related and use the same parts on many vehicles. And yes, it is manual. I heard the name battlewagon from an instructor in SCCA autocrossing in Milwaukee. Its nice to hear there are other wagon fans out there.
So far today, I have been trying to assemble a mock kammback. Here's what I have come up with:
Thanks for viewing and be kind, this is my first attempt!