Thank you Dan. Taking a quick look at these three files (chassis 1 and 2, and body), they appear to be the same as the microfiche I mentioned earlier. But unfortunately I don't have convenient access to a fiche reader.
I don't know how this compares to the "parts book", but it is very likely the same thing.
Two suggestions when using the linked files to identify part numbers: 1) If you go to the second file (chassis 2), the last half of it is the updated / substituted part numbers for everything in the diagrams. Those updated numbers are the ones you want to use to find parts, not the old numbers in the diagrams. 2) For those not familiar with using OneDrive (like me), after clicking on one of the files, look to the left top corner of the screen for "open". Then select "open in word online". The full file should open in a new tab.
Is it possible to add these three files to the "Wiki"?