1936 21 stud head cost

That is important,there are both domed and flatheaded pistons and each requires a head to match.
 
It sounds like you are trying to figure out correct model head will fit & its value so you can sell it ? If so , it has barely any more value than scrap . I hate to say that as I love all flathead stuff , but that about the reality of it for a cast head .
Cheers
Tony
 
Include a couple of good, clear photos of the head and maybe we can help with the identification if it is domed or flat.
 
C'mon guys - this is kindergarden stuff ! 68- heads are for domed pistons . 18- or 40- are for flattop pistons . Most 18- heads aren't marked but that doesn't apply here as you clearly state yours has 68- on it . Like stated above they aren't worth much as MANY are around .
 
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