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Thread: Help to identify GM heads

  1. #1
    Senior Member DYNO OPERATOR
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    Help to identify GM heads

    My brother has a BBC468 but we would like to know what type of heads is on it. I am not sure if you can look at a BBC head and tell like you can with a SBC you know double hump heads. We would like to know if they are oval or rectangle. I have seen where they say rectangle is the better of the two for performance. If any one could tell us would be great. The picture of the engine is in show off under woodsman's brother truck. Thanks for any help you can give.
    Wesley
    60' 1.30
    5.58 @ 127.89

  2. #2
    Administrator RACING JUNKIE
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    Wesley
    You'd need the casting numbers on the heads for a better reply,look under the valve covers and you'll see a number on the heads

    Then you can look them up on www.mortec.com

    Tom
    There Is 1 Thing Better Than Cubic Inches,,,More Of Them

  3. #3
    Senior Member DYNO OPERATOR
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    Thanks for the info Tom thats what we will do when I get back home.
    Wesley
    60' 1.30
    5.58 @ 127.89

  4. #4
    Senior Member RACING JUNKIE
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    Can't always tell from the intake manifold, but it is a square port intake and the block is a short deck blk. The reason you tell from the manifold is that a square port will work on a round port head but not the opposite.


    Zip.

  5. #5
    Senior Member DYNO OPERATOR
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    Thanks Zip we will just have to do like tom said pull the cover and check it out from the # 's. Thanks for the info.
    Wesley
    60' 1.30
    5.58 @ 127.89


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