crazy that there aren't any easily findable pictures on the internet somewhere. I wondered if it was some sort of add on thing for like a corvair, or something, because it's so flat looking. Like hood clearance was a concern.
One of the best threads I've seen - great investigation (except for the horse crap mulcher theory). Now, does it work on your engine? Take a video in case it blows up. You will get millions of youtube hits!
Well consider the fact that it looks like it might have been a hand-built, one-off experimental piece. Quite possibly the only one like it in existence. Though some of the patent designs linked to above are very similar in theory.