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Technical Early hemi coolant crossover

Discussion in 'The Hokey Ass Message Board' started by willys36, Feb 9, 2023.

  1. willys36
    Joined: May 6, 2006
    Posts: 3,154

    willys36
    Member

    Will a 392 independent crossover fit on a '55 331?
     
  2. Fordors
    Joined: Sep 22, 2016
    Posts: 6,495

    Fordors
    Member

    I don’t know a lot about Hemi’s but I think the low deck blocks won’t accept the 392 crossover, it will be too wide.
     
  3. SEAAIRE354
    Joined: Sep 7, 2015
    Posts: 553

    SEAAIRE354
    Member

    I won’t say 100% yes but the heads were thinner on the 392 to compensate for the taller deck. All the intake manifold are the same from 331-392.
     
  4. Just Gary
    Joined: Oct 9, 2002
    Posts: 5,816

    Just Gary
    ALLIANCE MEMBER

    Stock Chrysler crossovers are all the same size regardless of engine displacement.

    The difference is in the water outlet location on the front of the heads. On 354 heads, the water p***age is right next to the top edge of the head, where the valve cover rests (like mine, below). On 392 heads, the water p***age is almost an inch away from the top edge.
    20170523_182407-1.jpg 593089a642bd56c756f8868ab3a2ee72.jpg
     
    Last edited: Feb 10, 2023
  5. willys36
    Joined: May 6, 2006
    Posts: 3,154

    willys36
    Member

    Thanx for the replies. My experience is with 331 p***enger car and truck heads that all have thermostats in the intake manifold, no crossovers. I looked on the internet and it looked like 354 engines all had crossovers attached to the water pumps. only saw 392s with separate crossovers.

    354 pump/crossover.
    [​IMG]
     
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  6. All of the intake manifolds, 331, 354, 392 are not the same. Just try to put a 331" intake manifold on a 392" engine and you will se the difference.
     
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  7. deucemac
    Joined: Aug 31, 2008
    Posts: 1,649

    deucemac
    Member

    I used a stock 392 crossover with my 354 p***enger car heads on a 58 354 2 1/2 ton Dodge truck block and a Hot Hemi Heads sbc water pump adapter set up without any problems. Of course I only have about 40k miles on the steps up so far. I used a 180 Stat and a Dodge 360 water outlet.
     
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  8. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,522

    gimpyshotrods
    ALLIANCE MEMBER

    I have a 392 crossover on my 1956 354.
     
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  9. George
    Joined: Jan 1, 2005
    Posts: 7,982

    George
    Member

    Yes, the 392 crossover fits on the '55 331 car hemi. The 392 W/P should also. The long BB Chevy W/P will fit over the OEM car timing cover, using the HH adaptors
     
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  10. Stan Back
    Joined: Mar 9, 2007
    Posts: 2,721

    Stan Back
    Member
    from California

    Engine - Copy.JPG I went with the Chevy water pump as I didn't have any of the front water components. I figured if I needed a replacement ever, it could be easier to find.
     
    Last edited: Feb 11, 2023
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  11. willys36
    Joined: May 6, 2006
    Posts: 3,154

    willys36
    Member

    You can use the smaller manifolds on a
    That is pretty much how i am setting up this engine. With no heat riser do you have trouble with cold running engine?
     
  12. Stan Back
    Joined: Mar 9, 2007
    Posts: 2,721

    Stan Back
    Member
    from California

    It does run cool, but that's better than the opposite in sunny SoCal.
     
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