Story I heard was that Duntov came up with the concept and tried to sell it to the English just before WWII as a cost effective improvement to the flathead engines as part of the military buildup. Duntov had emigrated there befor the war started.
After WWII he came to America and got some funding for development, the chief designer was an engineer that schooled and emigrated to America along with Duntov - his name escapes me - this guy was unable to speak English and he did the early design and development. After completing the head he then went to work for Sikorsky designing helicopter mechanisms.
That engineer really had no interest in cars and had no idea what he created, it was late in his life that people made him aware of the importance of his contribution and he was inducted into the Hall of Fame with the last 10 years or less. He might still be alive but very old, there was an annual event where Ardun owners would drive thier hot rods to his house in New Jersey (I think) and give him a ride.
My memory has its faults, correct me where I'm wrong.