Aluminum Heads?

2

206lc

Junior Member
I have been lurking for a while. Spotted these and they followed me home. Could you assistance me in identifying. They are 21 stud and one is marked F 4E and the other M F 5C in the center top of the head. The one with F 4E has 015 stamped under the water outlet.

Are these rare? Will they fit on the 35 iron head flathead I have. I know I need a book, but was just hoping someone could give me a quick lesson.
 

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Don't think that they are that rare.
Had a set (virtually identical with no markings) on my '36.
They had to be replaced with iron heads because of alluminum erosion problems. (just because they are alluminum doesn't mean they are better)
 
They appear to be 36 heads,(judging by the small 'reliefs' ), and they will fit your 35 if it fitted with the dome top pistons.
 
Thank you for info. I am having a blast with this flathead engine and trying to figure this thing out. Probably paid too much, but they sure look pretty.

I am so happy to have stumbled on this site, it is actually one of my internet daily stops along with email. Thanks again to every one!
 
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