Mike the snowblower you have was made by Matsushita Electric Industrial Co. in Minneapolis.
Craftsman 5/23 with a 5hp Tecumseh engine and is track driven. Is this correct?
If you go to http://www3.sears.com and put in your model number they still have some parts available with diagrams. Looks like manuals are no longer available.
When I run the part #s from the Sears site on http://ordertree.com they turn up as Murray part #s with the right part description. So maybe Matsushita was taken over by Briggs/Murray. I don't know for sure on this just quessing.
While you wait for someone to come along and id the maker. You can still register with the ordertree link above and input your model number. You do have to sign up with them and probably get emailed with their spam offers....so I would set up a throw away email account for them to use to that end.