Uncle, try this link:
https://www.google.com/#q=site:67-72...1967+-+1972%22
I find it easier to search google for threads, than using the search on vbulletin forums. If you save the link, you can just replace the keywords (but leave the site:.... command) and it will pull up results for whatever you are looking for.
Hope that helps. From a cursory look, there seem to be numerous threads on the subject.