Gas cap

WI-Barracuda said

Any one have a picture of what this would look like as I might have one in my pile of parts as well.

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Here you go: the one on the left is an original and the one on the right is one made by one of our members @damraider IIRC.
FWIW the ones with the S-shaped handle will work but are not “correct” as they are aftermarket.