I was talking with an old time Labatt's driver on the weekend and he said that at one tiime they had a Smith brothers custom wrecker that had the streamliner cab, but it was sold reather than restored.
You are making great progress on your tractor. Good work on the engine.
Bob, quite a few years back Old autos magaxine did an extensive article on the restoration of the LaBatt's truck. I don't know if they have an archive section and I don't know when it was published, but it might be worthwhile checking with them for reference material. You can fine them at http://www.oldautos.ca/
You are progressing quite nicely with this project.