This was asked in the OP's second post... "I have been told this is a Ramar for a Ford banger, but it doesn't completely match all of the information I have found on them. Perhaps you can shed some light on them?" "RaMar" was a collaboration of Joe Jagersberger (Rajo Joe) who's Rajo shop in Racine, WI, got funded by Max Markman to develop the F head for the Model A & B. Most of Rajo's earlier efforts and wide success was with Model T conversions. As you can see, the adds are dated 1931. There was a two and the 4 port as the OP has pictured from the Speedway Museum collection. Here is the two port and some advertising pertaining to it. This car and engine are part of a private collection in Minnesota.