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Old 08-06-2025, 05:06 AM
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If you want to do it once and do it right then take a measurement and then buy the two needed Allen set pipe plugs ( aluminum ones are fine ) and the needed drill bit and tap.

Take your time and drill and tap deep enough to get the plug .050” deep off the intake flange of the head.

In the Aluminum type you can even find shallow ones so you do not have to tap as deep.
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Last edited by steve25; 08-06-2025 at 05:22 AM.
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