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The latter flathead Ford 8BA heads were redesigned to flow more water out of the rear of the block not less than the front. The water holes in the gaskets shown by the original poster are defeating this improved flow design.
Any head gasket that has those small restrictive holes allow the coolant to become super heated by the exhaust ports. Also those tiny holes always plug up quickly thus reducing flow making things even worse.
A thermostat is what controls water flow not tiny holes located in the wrong areas in a head gasket.
Using copper head gaskets allow much better heat transfer between surfaces and when installed correctly with the proper coolant flow work perfectly fine in all application's.
All of the above works perfectly in every Ford flathead engine I have built both stock and modified.
Ronnieroadster