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Thread: vortec heads
          
   
   

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  1. 12-30-2006 09:33 AM #1
    jimmyjeep
    jimmyjeep is offline CHR Member
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    Car Year, Make, Model: 1997 S-10 357c.i.
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    vortec heads

     



    What year did chevy start with the production vortec heads on the 350's and is any particular year "better". 2nd question is why do they need a "special" intake, is it the bolt pattern?
    "oohh...thats gonna leave a mark!"

    1997 s-10, 357 C.I., 350 turbo, speedpro 11:1,Comp Cam custom grind mech. roller, Canfield heads, 1.6 roller rockers, edelbrock tm-1, holley 750sp, Hooker Headers, MSD, 3K B&M stall, 4:11 gears
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  3. 12-30-2006 09:39 AM #2
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    Itoldyouso
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    I can only answer the 2nd part of your question. PreVortec intakes were 12 bolts, 6 per side. Vortecs are 8, 4 per side. I have a '99 Vortec engine I am going to use in my T, and I THINK Vortecs started in '96, but someone else will know for sure.


    Don
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  4. 12-30-2006 02:43 PM #3
    GTO389
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    vortecs came out on v8s in '96 but earlier in 6 cylinders i believe and yes you need a special intake
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  5. 01-09-2007 06:16 PM #4
    Charlyg
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    The bolt pattern is 4-bolts a side and the bolts enter the block exactly vertically instead of at an angle. In other words, straight up and down. And yes, the Vortec v-8 heads started in 1996 on the 350.
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