head stud seal and install

[Flathead Fever]

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Supposedly the threads in the block were a special interference fit, that's what originally gave the studs their seal. If you run a modern tap through each one of the holes you can destroy that interference thread. I've seen two people do that and end up with all most all of the studs seeping even with the sealer. It's got me so paranoid, I won't run a tap through the block.