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Chevrolet integrated head straight six

Discussion in 'The Hokey Ass Message Board' started by 56belairman, Jul 31, 2012.

  1. 56belairman
    Joined: Jul 31, 2012
    Posts: 2


    I've never really missed with anything with smog stuff. My question is can I just remove the smog tubes on my 81 chevy pickup straight six and plug the holes in the exhaust manifold and valve cover?
  2. the lights
    Joined: Apr 23, 2009
    Posts: 113

    the lights

    yes, you can do that. I had a tough time getting mine to run smooth though.
  3. pasadenahotrod
    Joined: Feb 13, 2007
    Posts: 11,776

    from Texas

    Get an earlier head and intake manifold. Not that hard to find and the integral heads won't survive the first overheat anyway.
  4. ottoman
    Joined: May 4, 2008
    Posts: 300

    from Wisconsin

    Agree.. integral heads are know for cracking. Dont waste your time with one, get a earlier head plus they make daul and triple carb manifolds for the earlier heads.

  5. 56belairman
    Joined: Jul 31, 2012
    Posts: 2


    Thanks for the advice guys. I'm probly just going the plug the holes on the tube that broke. Its furture has a V8 in it, so changing the head not really something I would want to do. I'm about tired of it wanting to die when you turn the a/c on!!!!! I feel a stock 350 with a r/v cam would get just as good gas mileage and have tons of more power then the six banger.
  6. F&J
    Joined: Apr 5, 2007
    Posts: 13,223


    Another problem with that setup on those C10s is HUGE carbon build up on the intake valves, just below the valve head.

    A fleet I worked for had a 1980 as a parts chaser, new. I forget at what miles, but it lost all power. Pulled the valves out, and they looked like a tapered carrot. The air/fuel mix could not get past, even when the valve was open. You could take it out on the highway in 2nd gear and keep it buried for a mile, and it would not go past 40/45 mph.

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