Yes, near the motor mount on the left side. ZL-1 blocks have a casting sequence number, a machining sequence number.
I have a small log of data on blocks that abruptly stops as of July 1969. Have not seen a later casting. They did a pilot run of ZL-1 blocks in the late '80s but used a different, darker alloy. A few of these blocks were machined and built. Somewhere I have a pic of unmachined blocks on a pallet.
Too bad, the entire ZL-1 story may never be told.
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08-03-2022, 01:11 PM
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