I think it's 40 Merc, I'll check one of mine. By process of elimination it's 40 Merc, all pre 1940 Fords have a shift tower hole, too big for 40 Ford, that leaves 40 Merc. The Lincolns are radically different.
nospartsman : I sent a reply but I'm not sure if it went out as the pm section says that you cannot receive. please respond to ramjet184@earthlink.net I can send more photos