Go to Larry Harsin's website @ <!-- w --><a class="postlink" href="http://www.olivertractor.com">www.olivertractor.com</a><!-- w -->.  Look on the links and there is one on "Oliver Tribute" by a guy who worked there.  It has some good stuff including factory pictures and different year equipment brouchures.  You can get a Larry Gay  guide book through Barnes &amp; Noble or any other reputable book retailer (though it may have to be ordered)