engine block VIN stamp

Discussion in 'VIN, Trim Tag & Drivetrain Decoding' started by fumiyo, Nov 21, 2019.

  1. 70lt1z28

    70lt1z28 Veteran Member Gold Member

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    I've heard that Tonawanda blocks didn't get the plug. Flint blocks did. Is yours a Tonawanda engine?
     
  2. Gary S

    Gary S Administrator Lifetime Gold Member

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    Yes, it is a Tonawanda engine. That might be the difference rather than if the block was machined for 2 bolt or 4 bolt.
     
  3. x77-69z28

    x77-69z28 Veteran Member

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    T = Tonawanda
    V= Flint
     
  4. 2ndGenCrazy

    2ndGenCrazy Veteran Member

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    I would get a magnifying glass and closely inspect the deck for the straight broach marks.
    I have never seen numbers that straight and perfectly aligned before. The depth of all of the characters should be the same same in my opinion.
    I'm not saying it isn't possible, but I have looked at many and never seen them like these.
    You could also check the casting date of the block on the back to see how close that is to Jan. 5th.
     

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