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    • April 7, 2011 at 1:53 pm #57699
      Robert and Mariet Jaarsma
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      I have many head all seem to have casting # 1980587, however the parts books show many different numbers. How can I tell which are for 1600, and which for 1725 engines ????
      Robert

    • May 9, 2011 at 1:53 am #64047
      Mike Schreiner
      Participant

      The Exhaust valve is a smaller diam on the 1600 head verses the 1725 head

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