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cylinder heads

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by bbblazer, Jan 30, 2001.

  1. bbblazer

    bbblazer Registered Member

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    which casr iron cylinder heads
    are best on a 79 350

    ///????///
     
  2. dyeager535

    dyeager535 1 ton status Premium Member

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    For the money? (and a truck looking for low end torque) Vortecs. (new and complete they are about $250 a piece) They suffer a bit at the top end, but with porting, they can hang with the best of them. Of course they require a new intake, but thats just an excuse to get a nice aluminum one :)


    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://yeagerd.home.mindspring.com/index2.html>http://yeagerd.home.mindspring.com/index2.html</A>
     
  3. ftn96

    ftn96 1/2 ton status

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    What is a good intake to run with the vortec's and the stock 90TBI unit??

    Will work for parts, beer and sex.
    90 Jimi,350/700R4/241/10bolts/3.73's/33's/4"
    <A target="_blank" HREF=http://mccordhouse.freeservers.com>http://mccordhouse.freeservers.com</A>
     
  4. Chaz88K5

    Chaz88K5 1/2 ton status

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    I have a good rebuildible set off a 88..they are the center bolt heads..make me an offer if u want em...u pay shipping.
    Chaz

    "Hondas look good under a k5's tires"
     
  5. Burt4x4

    Burt4x4 3/4 ton status

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    According to the "How to Hot Rod a Small Block Chevy" Book the most popular cast heads in the 70s were cast # 3965742 angle plug. There are soooo many choices it's gona be tuff to realy say one is better than the other.....

    Oh ya and Edlebrock has a new intake built for the Vortec heads that can be used with a Qjet.
    Good Luck


    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <A target="_blank" HREF=http://www.burt4x4.coloradok5.com>http://www.burt4x4.coloradok5.com</A>
     
  6. '73 K5

    '73 K5 1/2 ton status

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    I've got Vortec heads and certainly don't think they trail off at higher RPM's. Maybe its because of my cam, etc but everything improved when I swapped those on. More torque, and it really screams over 3k now.

    '73 K5
    Chevy good...Ford bad
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    I don't *think* that ANYONE makes a TBI manifold for the Vortecs yet. GM makes two manifolds, basically a performer and performer RPM (both rumored to be cast by edelbrock anyway) for about $100 more than the Edelbrock pieces. The Performer/"GM Performer" is the only intake that accepts the Quadrajet. The Performer RPM only fits squarebore carbs.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://yeagerd.home.mindspring.com/index2.html>http://yeagerd.home.mindspring.com/index2.html</A>
     

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