The procedure for going from a bare casting to a usable cylinder head is a long and difficult process, and the foundries that produce iron castings have virtually all moved overseas where the enviro-nazis aren't quite so difficult to deal with. Even something as simple and traditional as a Lodge brand cast iron skillet isn't made in South Pittsburg Tennessee anymore- - - -"Made in China" is the going thing. Ditto for brake rotors. Casting a stovebolt cylinder head for the few hundred of us who would buy one would be an economic disaster for anyone who tried to do it, let alone doing all the years of "curing" a "green" casting by leaving it out in the weather for several years to stress-relieve before doing the final machining. Repairing cracks in cast iron isn't impossible- - - -it's just E$$$$$PENSIVE!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!