327 block ID HELP

Discussion in '1960-1966' started by Scubasteve123, Feb 18, 2017.

  1. Scubasteve123

    Scubasteve123 Member

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    My block is stamped F030IYS just below the altinator and I haven't found any other stamps yet. Its on my 1966 K10 chevy truck. The truck was out of the Fremont California plant. I want to make sure it's a 327 and that it's original to the truck?
     
  2. Scubasteve123

    Scubasteve123 Member

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  3. coilover

    coilover Member

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    Plano US
    YS is the only suffix you need to look up. It is a 1966 327 with a manual transmission and has 220hp.
     

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