318 exhaust manifold interchange

Discussion in 'General Discussions' started by Samueltdt, Sep 29, 2016.

  1. Samueltdt

    Samueltdt Junior Member

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    I have a 1986 dodge ram w250 4x4. Will the exhaust manifolds from a 60s model truck work on my truck?
     
  2. RamV10

    RamV10 Member

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    Weren't the 60s 318s a completely different motor?
     
  3. Jimmy68

    Jimmy68 Senior Member

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    Manifolds off a Poly 318 will not fit a LA 318. But Magnum 318 manifolds will fit the LA and are a better manifold.
    But Headers are cheap and are best anyway.
     
  4. Samueltdt

    Samueltdt Junior Member

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    I'm sorry. I'm new to the dodge truck. I don't understand LA and all others. I just need to know will they fit or not? Or can you explain a little better.I've tried to look it up on the internet. You just can't get answers like you used to.
     
  5. crazzywolfie

    crazzywolfie Senior Member

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    what year manifolds are you hoping to use? they started using the LA engine in 64 so there is a small chance they might work but it should really not be too hard to track down some manifolds for it. any 72-91 ram truck or van with a 318/360 should have manifolds that fit. they are also interchangeable between left and right so it really don't matter which side you get them off.
    [​IMG]
     
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  6. Jimmy68

    Jimmy68 Senior Member

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    To add confusion they were still running the Poly in 66. So you do need to know what engine your gleeming parts off of.

    The Poly engine ran from 1955-1966/67.
    The LA engine ran from 1964-2002/2003.

    A lot of parts interchange between the 1962 to 1966 polyspherical A 318 engine and the LA series of Mopar motors (318, 273, 340, 360), including:
    Thermostat
    Thermostat housing
    Internally balanced 273-318-340 harmonic balancers
    Valve springs, retainers and keepers
    Main bearings (NOT 360 though)
    Rod bearings
    Crankshafts (reground 360's included)
    Flywheel
    Starter, both standard and high torque
    318 LA ring set
    timing chain and sprocket
    fuel pump
    oil pump
    oil pan (not 360) “The 360 front and rear seal/front timing cover is bigger than those of the 273/318LA/340 to accommodate the larger main bearings.”
    distributor pump drive gear
    distributor, standard points or electronic
     
    Last edited: Sep 30, 2016
  7. crazzywolfie

    crazzywolfie Senior Member

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    that is why i asked what year truck he is wanting to take the manifolds off of.

    if it was my vehicle i would just find the right manifold. they used the same parts for 20 years and it is not a super common part to fail so they are easy to find. i got 3 spares even tho i will probably never used them.
     
  8. Jimmy68

    Jimmy68 Senior Member

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    Ya. Stock sucky manifolds. Damn near find them laying on the side of the road. I've Got a pair. Maybe more.
     
  9. Sniper X

    Sniper X Senior Member

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    Any junkyard will have many sets that will work.
     

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