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Removed Head and Found Leftover Spacer Under Car... What is this?
Removed the head to put in ARP studs. Once I was done and had everything already labeled in bags, I found the spacer on the left under the car. I have no idea where this came from and was hoping someone might recognize it. Nut on the right is for size reference.
It also could be a spacer from the shoulder belt mounting bolt. There are a couple per side. Too thick for a head alignment pin as Ryan said. Did you replace your seatbelts with harnesses lately or remove a style bar?
I'm not certain it's the power steering shim. You'd know if it was. IIRC you have to beat/press it out of the bracket. Also they usually have a good ring of surface rust from the exposed portion of the shim.