273 Engine year Car 1967 Plymouth Barracuda

4spdragtop said

So does that mean May 10?

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Yes,
First digit 1-9 = Jan-Sep A/B/C = Oct-Dec
Last two digits are the date.
I should add or we'll be corrected, this is the "Scheduled Build Date", not necessarily the actual build date.

lightning said

And with block stamped 1-20-67 that would mean the block is a 67 I guess

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If that is the casting date then it is the date the block was cast, hard to say when it was machined. The engine assembly date is stamped on the front of the block just below the head.


Alan