First Flathead Build

[JSeery]

Extractor is not the way to go on a head bolt. Not finding it is most likely a blessing! You break off an extractor and you just complicate the problem and it is highly unlikely it would work anyway. Best method is to weld a nut to it and turn it out that way. The cast iron in the block will not be bothered by the weld and the heat will break the rust bond.