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  1. #1
    Junior Member

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    Join Date
    Dec 2009
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    15

    Default 80inch shovel heads on a 74?

    any trick to this? thanks.

  2. #2
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    Default

    Same head as the 74's ..

    Harley did three castings throughout the run of the Shovelheads ...
    66-74
    75-77
    78-84

    All are interchangeable ...

  3. #3
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    Default

    You'll need bigger pistons to go along with the 80ci cylinders. Slightly bigger bore compared to the 74ci cylinders.

  4. #4
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    I didn't read the part about going to the 80" 3-1/2" bore jugs ... ???

    What I did read was; will 80" heads work on 74" 3-7/16" bore jugs ...

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