Here's a link to some Holley history:
http://www.smethporthistory.org/brad...boratorco.html
George Holley was building cars and motorized bikes for a few years before Ford although he was better known for carburetors. Rumor has it that Henry made a deal with Holley to reduce competition, sort of a "I'll build cars and you supply the carburetors" deal. The Holley car was pretty advanced for the time so if this is true Henry made a very shrewd move.