"What is this" or "did this come off my car"?

If this gasket or seal didn't come off my car then it really doesn't matter what it is but if it did then it sure would help if I knew what it is. I have a 67 Dart with a 273/904. I pulled the engine for a 318 swap. I also removed the k frame, radiator, upper control arms, and steering column. Found it under the car. I thought it was a seal for the steering column but seems a little too small. The hole is about 1 13/16 inches in diameter and height is about 11/16 of an inch. Thanks for any help! Not sure if this is the right forum because I don't know what this thing is.

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