Nick--glad to see you getting involved with the Olivers.  I am not too far away, 10 miles south of Galesburg.  I probably have as many examples of the 80 series tractors as anyone close, and am glad to help any way that I can.  (I have an 80 rc with wide front, 80 std, 80 industrial, 18-27, 18-28, HP row crop, etc.  I also have some extra parts, as I have parted out a couple of 80s.  I may be able to help, depending on what you need.  I also have shop manuals, parts books, etc, and can help with sources for different parts.  Give me a call, or drop me an e-mail if I can help, or you wish to look at some different examples.  work-309-343-4125, home in evening 309-462-3635, <!-- e --><a href="mailto:oroliver60@abingdon.net">oroliver60@abingdon.net</a><!-- e -->.
Hope this helps, Terry.