Metal in oil?

This was completely gone through after it locked up a few years ago, it's on its 2 or 3rd oil change and the pan stared to leak, pulled it to find very thin metallic pieces that are not magnetic around the pickup tube area. With 10w 30 hot Idle 10~ psi and 40 at full rpm. What could this come from? (Farmall 350 with a c-175 engine 1947) (Third picture I used brake cleaner it's not water in the pan)

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Originally posted on r/EngineBuilding — View discussion