You know you got an EARLY head when...

Slant 6 Engines

  1. pishta

    pishta I know I'm right....

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    Sounds like a joke, eh? Well, its not ...
    1. There is no bolt boss by the thermostat housing for the "passenger side" alternator tensioner.
    2. There is no bolt boss next to the #1 plug hole for the 3 bolt alternator base to bolt up to.
    3. There is no "countersink" machined into the face of the threaded plug holes, its unmachined (STILL needs washers on plugs)
    4. Your valve cover has 2 "stacks" instead of one and a PCV grommet.
    5. Your valve cover is mostly flat across the top.

    Some of this stuff says 60-62 but I didnt see a date on my head. Just an FYI if you see a head at a swap meet and want to replace your 63-73 head and expect everything to bolt up identically.
     
  2. 805moparkid

    805moparkid SS And AFX Worker Bee

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    hmm my chart dosn't go back that far!
     

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  3. robertob

    robertob Well-Known Member

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    More:
    - larger CC combustion chambers
    - 'dime' in the combustion chamber surface
    - 3/8 bolt hole in rear rocker shaft post
     
  4. pishta

    pishta I know I'm right....

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    I might ad the heater hose spud is pretty small but mine may be the wrong size anyway.
     
  5. 805moparkid

    805moparkid SS And AFX Worker Bee

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    oh the temp sender is different
     
  6. BillGrissom

    BillGrissom Well-Known Member

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    Thanks. Great info. I never saw the charts that 805moparkid posted, and filed them away.
     
  7. 805moparkid

    805moparkid SS And AFX Worker Bee

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    i try to from time to time just for that reason
     
  8. Hyper_pak

    Hyper_pak Old School Chrysler Fan

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    Anyway you can post pictures of the differences?
     
  9. Bill Dedman

    Bill Dedman bill dedman Legendary Member

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    RE: #3, are you saying that some drool tube heads need spark plug washers AND drool tubes? Is that IF they don't have the countersink machining on the sparkplug holes? Please explain...

    RE: "Some of this stuff says 60-62 but I didn't see a date on my head. Just an FYI if you see a head at a swap meet and want to replace your 63-73 head ..."

    What would be the reason for doing that? Just askin'...
     
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