To all, thank you. I did make a tool to dig out the excess rubber in that very small channel in the larger channel where the seal goes. After grinding a screwdriver tip to fit and act like a razor scraper, that was a start. Grinding a 90 degree pick to fit and dig out the small channel inside, lots of rubber came out, and with an air grinder, with a scotch Brite pad on, it took a lot of effort to finish that. No small job. Might have been the original 90-year-old seal in there! I never did find any other info except here. So again, I thank all. It is in first paint now, so it can go back in the car. I am sorry that my expert cousin , Dick, passed away 10 years ago, he knew most all!