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  1. #1

    milling head on 05 gp1300

    would it be safe to say that the magic milling number is .021 for 150?


  2. #2
    powerstroke specialist mikegp's Avatar
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    pm wfo he will be able to guide you correctly.

  3. #3
    SJ-(KY)'s Avatar
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    I would also like to know how much to take off the head an squish area for optimum compression on 93 octane?

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