I had a guys 50 Ford car with the flathead six here a coupe of years ago, and there was an Edmunds head and dual intake in the trunk. I don't recall what the intake ports looked like, but if you are sure it is Ford, I bet it is that flat 6. Bear in mind what years Edmunds was producing parts...right then, not later OHV 6 fords
Its not for a Ford, its for some variation of Stovebolt Chevy. All Ford six cylinders (that I know of) have 4 intake ports, the chevy's have three. Thats the quickest way to identify a chevy vs Ford intake.
Pretty sure that's because the 'clamp' with a single bolt to the head served as mounting for the lower portion of the intake flange and the exhaust manifold. That's pretty much a Chev intake.