Drill & Tap Intake?

I put the sensor in today. I could not get the 3/8 plug out so I just drilled it plug and all. I almost tapped it too deep. The adapter is about one turn from bottoming out. I tapped a straw onto the end of my shopvac to suck all the chips out.
I started it and got it heated up with no leaks. Thanks FABO for the advice.

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