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Thread: 454 truck heads?
          
   
   

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  1. 04-09-2004 12:04 PM #1
    ericingram
    ericingram is offline CHR Member
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    Car Year, Make, Model: 1969 Chevy Nova
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    454 truck heads?

     



    I need to find out (asap, that's why i'm posting now instead of trying to look up my casting #'s) what kind of ports (oval or rectangle) are on my 1979 gmc 454, out of a 3/4 ton suburban. Was there a standard for this kind of truck?

    Thanks
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  3. 04-09-2004 12:14 PM #2
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    viking
    viking is offline CHR Member
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    Car Year, Make, Model: 23 T, 53 FLH , 66 C-10 454, 03 CVPI
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    oval
    Objects in the mirror are losing
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  4. 04-09-2004 12:58 PM #3
    ericingram
    ericingram is offline CHR Member
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    Cool, just curious but what's the basis for that? 2 bolt or 4 bolt?
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  5. 04-09-2004 01:21 PM #4
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    viking
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    Well as far as I know (insert 2 cents) there were no IRON rect's between 71 and 91 save the service replacement ones, as for the 2 or 4 bolt, could go either way, get some #'s and post .
    Last edited by viking; 04-09-2004 at 01:25 PM.
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  6. 04-09-2004 01:24 PM #5
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    stepside454
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    Car Year, Make, Model: 75 GMC C-15
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    79 was most likely the "peanut"port head, small oval port. Great for low end torque, but dont flow very well for any kind of performance use over 5000 RPMs.
    75 GMC C-15 factory 454, automatic, lowered
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  7. 04-09-2004 03:07 PM #6
    ericingram
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    can anyone suggest a new set of performance heads? I am slowly turning this thing into a drag car and am going with a 1050 dominator, is oval or rectangle ports more effective for upper range power?
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