Have you figured out your overheating problem yet? I live in Hillsboro,MO. I had the same problem with my 69 Firebird but I think I have cured the problem but won`t know until the temps climb and the rain stops so I can get it out for a long drive. Allen P.S. if you have to any car shows in the area you may have seen my car there.Sorry did not notice your location thought you might have been from Missouri.