exhaust issues with newer smog heads

Early A-Body Discussions

  1. waggin

    waggin moving on ain't easy if you drive a Ford :p

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    the 273 drivers side manifold will not fit with the later style heads such as 302's grinding the head in that area is a big No-No as it has a water port there, so be careful or you'll have a broken 273 manifold on your hands
     

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  2. Robbie2734

    Robbie2734 Lambcharger

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    Have you tried a double gasket? It might just clear. Cometic has been a big help, they can give you almost any thickness you want.
     
  3. oldkimmer

    oldkimmer FABO Gold Member FABO Gold Member

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    ..........could u not do alittle grinding on the head and manifold to make them work.....i've used thick header gaskets on 67 up 318s....kim....
     
  4. waggin

    waggin moving on ain't easy if you drive a Ford :p

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    it will take about 1/4" of gaskets to fix the problem.I posted this up to save some headache's for others, friend of mine did this to his car and I have the broken manifold and the head that got trashed. just had the camera in hand while I was digging for something else
     
  5. chryslerfat

    chryslerfat Well-Known Member

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    I have done it on mine. At first I tried to just take it from the head and hit the water jacket as soon as it cleared. My 2nd attempt was 1/2 from the head and 1/2 from the manifold and that worked nice.
     
  6. Valiantsignet20

    Valiantsignet20 Well-Known Member

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    I ground down the lower port casting just a bit, same on the manifold and made spacers with 1/4 aluminum plate for the ports. I had done the same thing your buddy did with another set of heads and it took 6 years before the water jacket rusted through.
     
  7. RedFish

    RedFish Well-Known Member

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    Couldn't the water port be welded closed again ?
     
  8. waggin

    waggin moving on ain't easy if you drive a Ford :p

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    maybe even braze it shut again, It's just an awareness thread :) all kinds of info popping up on this subject :glasses7:
     
  9. RustyRatRod

    RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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    Good info. I think I would just use the right head and be did wif it.
     
  10. furydan

    furydan not so junior member

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    I broke 2 manifolds before I figured out the problem. Had one manifold welded and then ground the head while still in the car. I was unaware of the water jacket issue. I guess I got lucky. The manifold fits and no leaks from the head. The 1st one I broke I thought I had the gasket pinched or something, nope...
     
  11. mischiefdart

    mischiefdart Well-Known Member

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    I have the later A-body 318 manifolds on my '70 dart with '83 smog heads with the air injection bosses. I carefully ground down the head till the drivers side manifold fit. I use exhaust dealer with no gaskets. No problems so far.
     
  12. Hell_Fish

    Hell_Fish Well-Known Member

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    Spitfires fit with no issues.
     
  13. chryslerfat

    chryslerfat Well-Known Member

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    Yup but they are like hens teeth.
     
  14. lilcuda

    lilcuda Well-Known Member

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  15. waggin

    waggin moving on ain't easy if you drive a Ford :p

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    this aint the spitfires fit awesome thread Jr....it's an informative thread about early a manifolds and late model heads glad ya like the spitfies :)
     
  16. Hell_Fish

    Hell_Fish Well-Known Member

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    Sorry Waggin, I have the 302's on my 273, but never tried the OE manifolds on the engine. ;)
     
  17. waggin

    waggin moving on ain't easy if you drive a Ford :p

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    It's ok dawg just tryin to save folk's some headache, the 302 heads are awesome that's why we have this thread, the manifold and the head were both learning experiences so figured a good idea to share........:glasses7:
     
  18. RustyRatRod

    RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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    Hay curtis, I know you didn't put this in the mix.....but I bet the Dakota manifolds will fit that late model head. At any rate, it's good info. Might keep somebody from bustin a otherwise good mannyfold.
     
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