21-Stud Cylinder Head ID Help needed

[sshep]

These appear to be cast iron aftermarket 21-Stud cylinder heads.


They are stamped FOM, 8-17-43, and Made in the USA.



Any information on them would be appreciated. Who made them? Were they actually manufactured during the war? Was this for a military application or strictly just an aftermarket replacement head?

 

[38 coupe]

That is an aftermarket replacement head. Combustion chamber looks like a copy of the standard Ford 1937 chamber.


All era Ford heads I remember looking at have a much cleaner cast surface and better controlled bosses where the head studs holes are drilled.

 

[petehoovie]

These appear to be cast iron aftermarket 21-Stud cylinder heads.


They are stamped FOM, 8-17-43, and Made in the USA.



Any information on them would be appreciated. Who made them? Were they actually manufactured during the war? Was this for a military application or strictly just an aftermarket replacement head?