[Short 3/4]

That’s a great find Clay!
If it was me, I’d use that rebuilt one for a spare and run the NOS one. I bet you’d have the quietist 221 on the planet. While it’s a great museum piece, IMO this stuff was built to be used.
Kind of hard to read the date code in the picture, but looks like 73? If so must have been one of the last ones built.
Checked out your build thread. That project of yours is looking really nice, keep up the good work!
Tom