340 Identification.

Looks like gasket sealer that squeezed out.

The numbers at the oil pan tell you what car it came out of-it's a partial VIN number. The info you're looking for is under the head and if it's not a factory replacement block, the numbers are there. Scraping the paint off with a single edge razor blade may help reveal them.
a little sanding exposed a little bit of them. Any info on what you guys can see would be helpful since I can piece a whole number out to decode it.

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