I remember articles and photographs of different people's efforts along this line, Gerald. A picture of a flathead that appeared to have four Strombergs on the exhaust manifolds was definitely interesting!

Most likely the result turned out to be not worth the effort and expense.

Speaking of unconventional approaches, and I don't intend to deflect your thread away from your inquiry, but does anybody know whether anything ever came of Bus Schaller's quarter-speed (as opposed to half-speed) camshaft concept?

At first glance this would seem to be a fine idea given the wild RPMs racing engines are turning these days.

Someplace in the big mess I call "my files" I have an article on Mr. Schaller's development efforts. The camshaft looked unique because a cam lobe had to lift the valve twice in one (cam) revolution, so one lobe had high points opposite, or 180 degrees apart, from each other.

The design must have had shortcomings, otherwise we would be running quarter-speed cams now. I wonder what those shortcomings were?

Jim