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  1. #1
    bmxjoe's Avatar
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    300 HP head/ gasket on a 215HP?

    Is the 300 HP head compatible with the older block? Are the valves in the 300 compatible with the old head? Can the 300HP head gasket but used on the older head/block assembly? Just wondering what kind of frankenstien builds are possible. Thanks in advance.


  2. #2
    Cosmicbrut's Avatar
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    The 300 gasket is compatible with a 4tec it will lower your compression about a tenth of a point because its thicker. The valves are the same as well.

  3. #3
    bmxjoe's Avatar
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    If the 300 head gasket works without modification on a stock 215-260 block then I would assume its safe to say that there would be no issues running the complete 300 head?!

  4. #4
    connorrxp's Avatar
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    I've got a 300 gasket ready to go on my 1503, there was a thread talking about drilling additional holes in the gasket for cooling

  5. #5
    bmxjoe's Avatar
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    Yea I'm pretty sure that's not gonna be necessary unless your running a block guard, since the holes do not line up correctly.

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