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Need Help, Boy did I screw up

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BlazerBoy, Aug 29, 2000.

  1. BlazerBoy

    BlazerBoy 1/2 ton status

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    I messed up guys, need a little help. While I was rebuilding my 350 motor, I messed up putting on the timing chain, I was off a few links, I got kinda confused with all of the stupid keyway slots, anyways. I tried starting it, and ended up bending most of my push rods, and quite a few of my valves. So now I am looking into getting new valves and redoing my heads, I wanted to have a 3 angle valve job anyways. Or just get new heads. I have an 87' with TBI I was wondering if pre 87' heads will bolt up, The reason I ask is I have a friend that has some nice aluminum pre 87' heads. I know mine are centerbolt style, is that the only differance?? Thanks guys..

    BlazerBoy
    http://generalblueballs.coloradok5.com
     
  2. River

    River 1/2 ton status

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    The bolds of the intake manifold are under a different angel. I know their exists intake manifolds for TBI that fit on non TBI (pre `87) heads.

    Greetings from Amsterdam,

    River `90 K5, 350, TH700R4, NP241, "33, 3.08, 10 bolt F, 10 Bolt R
     
  3. BlazerBoy

    BlazerBoy 1/2 ton status

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    Now that you mention that, I recall hearing that the center 2 bolts are at a differant angle. I think that was it, Anyways I thought I heard of people redrilling these holes to fit. Is that not a good option? I have never seen it so I dont know how differant the angles are. Thanks

    BlazerBoy
    http://generalblueballs.coloradok5.com
     
  4. Emmettology 101

    Emmettology 101 3/4 ton status

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    Hot Rod did this a while back. I tried this a while ago and eneded up srewing up my intake. It could probably be fixed, but I just went out a bought the right intake witht he different angle bolts. ou could probably take you intake to a engine machine shop and tell them you want the TBI manifold to fit on the old style heads and they will do a hell of a lot better job than me with my Craftsmen drill![​IMG]

    This will probably be cheaper than a new intake!

    My probelms was that after I drilled, I calculated wrong and my holes were oblonged and too big and cause an intake leak. The machine shop should be able to do it right!

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; http://emmett.coloradok5.com
     
  5. BlazerBoy

    BlazerBoy 1/2 ton status

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  6. BlazerBoy

    BlazerBoy 1/2 ton status

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  7. realsquash

    realsquash 1/2 ton status

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    If it were me, I'd buy a set of cast-iron Vortec heads right from GM. Complete heads with valves and springs runs about $400 or so depending where you get them. They flow very well and work very well. You will gain close to as much HP/TQ as most un-ported AL heads, such as trick flows. But you might need to get a custom chip from Howell to get the best performance.

    Squash
    http://www.trailrunners4x4.org/users/realsquash
     
  8. realsquash

    realsquash 1/2 ton status

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    When you redrill the intake, the bolt heads will not sit correctly on the intake. Maybe there are angled washers made, but i still don't like it. The vortec heads will be a direct swap for your broken original heads. The valve covers and intake will fit right on.

    Squash
    http://www.trailrunners4x4.org/users/realsquash
     

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