Early 273 oil gallery plug removal

Wally-T said
Thank you. If grinding a bolt doesn't work, I'll try evil bay lol

I found a Snap On truck and bought a set that had a 5/16 in the set. It was like $60 for a set of 5 or 6 different sizes, and took a week or two to get shipped to the Snappy guy. He called me and I picked it up the next day.