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Thread: 291 LS-5 bbc heads

  1. #1
    Senior Member SENIOR BUILDER
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    291 LS-5 bbc heads

    what are these heads and are they decent bbc heads
    if something goes wrong there is always the cooler!!!

  2. #2
    Senior Member RACING JUNKIE oldandtired's Avatar
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    Re: 291 LS-5 bbc heads

    Quote Originally Posted by ejm
    what are these heads and are they decent bbc heads
    3964291 are 69 to 70 109cc closed chamber rectangular heads.
    396/402/427/454/with 13/16 or 5/8 spark plug (gasket or tapered).
    Hard to get good flow around the valves with the "bathtub" chamber.
    Dave
    http://www.racingjunk.com/profile/343797
    "All that is necessary for the triumph of evil is for good men to do nothing" Edmund Burke

  3. #3
    Senior Member SENIOR BUILDER
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    well got motor home and they are 3964292 bbc heads just wondering if they are any better and what they are
    if something goes wrong there is always the cooler!!!


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