I'm working on cleaning and painting the underside of my 1956 sunliner when I discovered some kind of plate missing off the bottom of the bell housing. It seems to have been held on by a screw on one side but I'm not sure what held the other side on. A few mechanics and speed shops have worked on this engine and trans, but no one ever mentioned it. I can look in and see the flywheel and it does leave quite an oil slick in my garage. I've looked in catalogs and on the internet but can't seem to find it. Any ideas? Thanks