Darn broken bolt

I first want to thank everyone for their input. I used many of the ideas provided!
UPDATE: the broken bit is out and I’m dressing up the original bolt that snapped off, and then run a tap & die set in hole to rethread it.
This is now tho open hole...:
EF2866C2-9615-40A1-B69E-918C60B1FEBF.webp
EF2866C2-9615-40A1-B69E-918C60B1FEBF.webp

This was what I finally got to cleat the hole,..
5D33A6FC-997A-4D92-AE9F-F60C190EDCC1.webp

The rotary air tool with a few Carbide Burr’s did the trick! 👍🏻
I also FILLED four holes today! Received my OEM pan plugs (4), as I was missing 2, I figured I’d just put new ones in all the way around.
 
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