Yes, I can remember a guy coming into my first little shop- must have been in the late 1970s/early 1980s- with photos of that engine, trying to tell me this was what everybody had been waiting for. That guy was starting to get into Harleys, riding a Triumph at the time, and later became one of Germany's biggest wholesalers of Taiwanese Harley accessories (or should I say "Genuine Harley parts, designed in America"?). I laughed him out of the shop- it seemed an over-complicated and potentially troublesome way to try to beat the Japs at their 4-cylinder game. Never heard from it since.
Joe Seifert