Holley 3972121 4555

Discussion in 'VIN, Trim Tag & Drivetrain Decoding' started by TJ2WHITE2, Jan 13, 2019.

  1. TJ2WHITE2

    TJ2WHITE2 New Member

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    I have a Holley 3972121 4555 with 012 date code. I'm sure this has been covered many times - what is this for and date built?
    Thanks.
     
  2. servello2005

    servello2005 Veteran Member

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    that Holley is for 70 z28 4sp date is January second week of 70.
     
  3. TJ2WHITE2

    TJ2WHITE2 New Member

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    Thanks!
     

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