Unusual casting and stamped numbers

Discussion in 'VIN, Trim Tag & Drivetrain Decoding' started by Gtramm, Aug 21, 2020.

  1. Chevyforever

    Chevyforever Veteran Member

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    Yes, agreed now that we have better pictures, those are "063" cyl. heads. Oval port, closed chamber.
     
  2. Gtramm

    Gtramm New Member

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    The 1063 casting number is quite clear on the head. That being the case, what does the 10-312132 refer to?
     
  3. Gtramm

    Gtramm New Member

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    I agree on the head casting number 063. What I can’t find is anything on ithe 10-312132 number. It’s cast into the head. I have never seen an additional casting number on a head. The left head is identical to the right.
     
  4. TOJOE

    TOJOE New Member

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    I think you have mistaken the screw slot as a "1" on the heads. The foundry screws in the part number on the pattern and that is what you are seeing. If you look closely you can see the screw imprint. Probably should be 0- and not 10-.
     
  5. Gtramm

    Gtramm New Member

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    I did see the screw mark. Definitely not a 1. Thank you
     
  6. INSPECTOR57

    INSPECTOR57 Veteran Member Lifetime Gold Member

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    Kinda surprised with all the knowledge on NastyZ that nobody has pointed out that Chevy used the 0- prefix to identify prototype or pre-production parts. Here's a few links where it's mentioned:
    https://www.yenko.net/forum/showthread.php?t=155179 see post #9
    http://www.camaros.org/forum/index.php?topic=13469.0 see posts #5 & #9
    https://www.yenko.net/forum/showthread.php?t=161208 post #1
    https://hotrodenginetech.com/1969-z28-canted-valve-302/ about halfway down the page - block pic
    https://www.gt40s.com/threads/zl1-canam-block-help.26244/ mainly about blocks

    The numbers on the ends of the head are hand stamped & likely reference build sequence or parts used as mentioned in previous posts.

    Gary
     
  7. Gtramm

    Gtramm New Member

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    Gary,
    Thanks for the information. I was in a dry hole getting nowhere.

    I still have questions but I need to go through this material thoroughly first.

    this engine is an extra for me. Not sure what to do with it. If by chance it is a special engine then perhaps selling it is a good idea. It’s a 2 bolt while those mentioned all seem to be 4 bolt. Also, I didn’t see any 512 blocks. Be fun to know what it was in.

    thanks again.
    Greg

    It’s still a bit of a mystery.
     

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