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Thread: BBC head ID

  1. #1
    Senior Member MASTER BUILDER
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    BBC head ID

    Can anyone give me info on these stock oval port BBC heads & if they are decent or is there something better other than a big priced alum head?

    Casting #'s on both are 3917215
    1 has E 247
    1 has F 87

    Any info appreciated
    Dave
    http://i399.photobucket.com/albums/p...ber13417-1.jpg

    SEMPER FI!

    U can step on the brake
    U can step on the gas
    But step on ur crank
    Ur gonna get passed!

  2. #2
    Senior Member SENIOR BUILDER
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    3917215, 1967-69, 396/427, Closed chamber, 109 combustion chamber
    if something goes wrong there is always the cooler!!!

  3. #3
    Senior Member MASTER BUILDER
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    Ok so now I know what they are, but are they any good or would you try to find something different?
    http://i399.photobucket.com/albums/p...ber13417-1.jpg

    SEMPER FI!

    U can step on the brake
    U can step on the gas
    But step on ur crank
    Ur gonna get passed!

  4. #4
    Senior Member DYNO OPERATOR
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    I have a set of those, 68 year model, for sale, if you need an extra pair.

  5. #5
    Senior Member MASTER BUILDER
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    Quote Originally Posted by hambone82
    Ok so now I know what they are, but are they any good or would you try to find something different?
    It really depends on what you are trying to do, but they came from the factory with 2.06" and 1.72" valves. If you are putting them on a flat top engine they will boost the compression up by a couple of points, but they could really stand to have the larger 2.19" and 1.88" valves installed and bowl work, if putting them on a 427 or larger engine. The normal consensus is that the open chamber heads work better with flame travel and combustion, but I have run 9.50's with closed chamber rectangular ports on a 468.


    Bill Mitchell


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