5.9 mag into d250

Magnum Engine Swaps

  1. superbinder

    superbinder Active Member

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    I want to swap a 2000 5.9 magnum into a 86 D250 4x4 with 4 speed. Want to keep factory efi, too. What flywheel would work? It has a 360 now.
     
  2. JDMopar

    JDMopar Well-Known Member

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    I would think you will need one from a 2000 Dodge truck with a 5.9 Magnum. If you buy a new one, be sure to specify that you have a 5.9 gas engine, not a 5.9 diesel. The flywheel from your 360 won't work. It does not have the notches needed for the ignition, and the balance on an LA 360 is way different than a 5.9 Magnum.
     
  3. sireland67

    sireland67 Well-Known Member

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    I used a mcleod flywheel that that takes a bolt on weight when I put the mag in my W150.
     
  4. superbinder

    superbinder Active Member

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    I would need to use a clutch for a 2000 5.9 magnum and possibly the disc from the 1986 or are the trans splines the same?
     
  5. sireland67

    sireland67 Well-Known Member

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    What is the clutch size on the 1986?
    You will want to use one for the trans you are bolting the motor to.
    Most likely it is a 143 tooth flywheel with a 11” 23 spline clutch.
     
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