Not that anyone else got stuck in this rabbit hole...but, the fork, at least, is definitely not Davis/Dayton-built...nor do I think it is a Shelby fork. This, however, is a 'Shelby-built Davis'...note the sweetheart chainring with drive pin in heart and triangles instead of later Shelby teardrops... I think I'm just muddying things up. Close up pics of dropouts, chainstay, seatstay, and tubing joints may help. Was there any serial under the bottom bracket?