Great article. It reminded me of a conversation I had with Dick Keinath (RIP) who was the designer of the 427 Mystery Motor. He related a story about a reporter who asked some GM execs at Daytona in Feb '63 about their new engine. They replied, "What new engine?" That's how secret its development was. Dick said, "That's when the poop really hit the propeller." Of course he was referring to the shutdown of the MK-II works.
Hell of an engine!
Verne