All 6 cylinders were stuck. Re-ringed and repaired. Fired with crank, switched to using the starter. As you can tell by the cables, that wasn't the original plan. Nice work Dirty!!!
Dirty believes this likely came out of a Linn tractor. The 6AB was fairly rare.
The quick movement to shut it down was because the oil filter was spraying a line of oil it didn't seal well at the bottom.

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