I think Motor City Flathead uses a port design similar to what you describe. It is strange to think of a port design that is partly shared by intake and exhaust and must flow in both directions. Sort of like a siamese port with the valves in the middle. It seems that whatever is done to help the intake will not be good for the exhaust and vise versa. I guess that the exhaust has the advantage of help from the piston so the intake is the main concern. Maybe that is why so many of these engines have strokes longer than their bores. Once you get a flow going keep it going. Yep, they need blowers.
Beater
