Rare Dodge Dart GT? Which engine is this?

In terms of the fender tag, it’s been very challenging trying to decipher what’s on it due to dirt and paint that had to be scraped off. I can make out a few digits but nothing comprehensive. Is there anything I can apply to it to clean it up?

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I wonder if you could do a pencil rubbing of it? That might bring it out. I would sure be careful with it, whatever you do.