Your descriptions are too vague. We are well familiar with PP, including a those from that era. Please find someone with a camera before you go taking large wrenches to something! This is the worst time to do this. If you screw it up, you could be without water for 2 more days, or you will pay a Plumber $250 an hour holiday rates to come out! PP showers are usually quite fixable, but I would not take anything apart on the Sunday before labor day, because you will have no access to replacement parts, etc. photobucket.com is free and very easy to post pics.