So what's the deal with spark plug washers?

Drool tubes do not always equate to no washers: you can tell if head has been changed by looking at spark plug counterbore (63+) or lack of on early 60-62. No counterbore/flat on early head means it still takes a gasket on top of the flat ended drool tube.

"The factory TSB discussing the cylinder head changes for '63 and the importance of using the gaskets in '60-'62 heads and not using the gaskets in '63-up heads..."
@slantsixdan Dan.

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