ZL-1 casting dates

[KevinC]

If you are still looking for casting dates, I have one of these blocks and the casting date is 4 1 69. Hope this helps.
Kevin C.

[GMH454]

Thank you kevin every bit helps.
Welcome, glad you have come on board.
Can you please fill in your profile, it keeps the folks here happy.

[Eddie M.]

here's one for you

[KXW]

I own a 052 block dated 19 Mar 69. I'm going by memory here, I believe the number below the date code is #266. Hope this information help?

[rpoz11]

Im starting to wonder over these images as well as mine I had. Casting date first then: block #? I am starting to wonder that the # under each casting date is the number in order from 1 that was casted? ie: 266'th Block made, 446'th Block made???? In relationship to casting dates Ive seen and observed, the casting dates clearly reflect a chronological numerical below each date! Each number seems to correspond correctly with progression to dates given. Any thoughts from the Board here on this?

[yountto]

Does anyone have an 052 casting block with a TO317ML on the pad??

[GMH454]

I have been starting to wonder that myself. If these were cast in batches, then the numbers might have been progressive through production, not numbered by the batch.(or maybe the batch casting is another long term established Chevy myth ) ????

[rpoz11]

Well, it's a matter of getting this info together and having enough real samples to present a probable sequence order. If the results show no number repeated itsself, then quite possibly each block having it's own numerical might help in the actual # of the 6052's made. Theory so far to me but possible. I would hope maybe sYc or Cunnen could help position this suggestion; time will only tell...