Found this stuck to the oil plug. Do you know what it's from?

 

Im almost positive that it is part of your windage tray. It is the back part of it that is held down by the oil pump bolt. Mine broke off and looked exactly the same way when i took off my oil pump but the only difference is...my motor is already apart. Your tray may be rattling around a little loose.

 

I'll find out if you're right in a couple weeks when my new heads get here.

 

Duh it's a quarter!

 

I knew someone could figure it out!