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Thread: intake manifold selection
          
   
   

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  1. #1
    nicelysedated's Avatar
    nicelysedated is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2005
    Location
    syracuse
    Posts
    8

    intake manifold selection

     



    I have a 396 block with 402 heads that are casting number 3993820. Are these heads oval port, chevy oval port, or large oval port? Summit asks for the stlye of cynlinder head and those are the options. The only info i can find on those heads is that they are 402 or 454 heads, open chamber, 113cc. Thanks

  2. #2
    stepside454's Avatar
    stepside454 is offline CHR Member Visit my Photo Gallery
    Join Date
    Dec 2003
    Location
    Festus
    Car Year, Make, Model: 75 GMC C-15
    Posts
    342

    large oval
    75 GMC C-15 factory 454, automatic, lowered

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