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  • 2 Post By rspears
  • 3 Post By glennsexton

Thread: 454 Head Intake Mismatch

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  1. #1
    Fite13 is offline CHR Junior sMember Visit my Photo Gallery
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    Mar 2021

    454 Head Intake Mismatch


    I have a 454 from a 72 Corvette. I have never rebuilt an engine. Forgive my stupidity, but why does this intake not match up with the heads? See the pics.

    The heads were given to me but I don't know the brand.

    Intake 1.jpgIntake 2.jpg

  2. #2
    NTFDAY's Avatar
    NTFDAY is online now CHR Member Visit my Photo Gallery
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    Aug 2003
    Car Year, Make, Model: '66 Mustang, 76 Corvette

    I'm no expert, but from your pictures it appears you're trying to put a small block manifold on a big block. Others with more expertise than I should be able to reply with a better answer.
    Ken Thomas
    NoT FaDe AwaY and the music didn't die
    The simplest road is usually the last one sought
    Wild Willie & AA/FA's The greatest show in drag racing

  3. #3
    rspears's Avatar
    rspears is online now CHR Member/Contributor Visit my Photo Gallery
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    Sep 2007
    Gardner, KS
    Car Year, Make, Model: '33 HiBoy Coupe, '32 HiBoy Roadster

    Also no BBC expert but do you have Rectangular Port heads with a Oval Port intake? A Rectangular Port Intake can fit on either type head and seal, but an Oval Port Intake cannot - it leaves part of the ports exposed. Google the gaskets and compare the top of port relative to the bolt holes.
    NTFDAY and glennsexton like this.
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  4. #4
    glennsexton's Avatar
    glennsexton is offline CHR Member/Contributor Visit my Photo Gallery
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    Mar 2005
    Car Year, Make, Model: 63 Nova SS

    Welcome to CHR - no dumb questions here. We're all still learning at some level.

    Looks like you have a 7561 manifold (number cast on the right rear of the manifold) - for oval ports. You need a 7562 for rectangular ports.
    Dave Severson, NTFDAY and rdobbs like this.
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