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School me about my heads

Discussion in 'The Garage' started by mechted, Nov 19, 2005.

  1. mechted

    mechted 1 ton status Premium Member

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    Location:
    Granbury, TX
    I ran the head casting number on Mor-tec and came up with this:
    "3931063....68-69...oval..CLOSED..396, 402, 427, 101cc chamber"

    This verifies what PO told me about the engine "396 from a 69 Chevelle."But i dont know what the rest of it means? (Oval, closed, 101cc) Anyone know what exactly this means? are these "good" heads? Can you explain this to me please
     
  2. RustBuket

    RustBuket 1/2 ton status

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    101 is the size of the combustion chamber in cubic centimeters. Oval is the shape of the ports. I believe oval ports are good for low end torque and rectangular are better for high RPM hp. I don't know what closed means.
     
  3. sled_dog

    sled_dog 1 ton status

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    closed chamber. Not good for flow but usually higher compression. Not big block knowledgeable to say how 101cc will be.
     

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