Indy LAX Cyl Head on a Magnum

Magnum Engine Swaps

  1. mario03srt

    mario03srt FABO Gold Member FABO Gold Member

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    All,

    I have been searching for details on swapping a LAX head on a Magnum 5.9 block. Can someone point me in the right direction please? I have some adj SS PRW Roller rockers with hollow Comp 7958 Hi Techpush rods currently in my 367 setup. I "guess" the PR's won't be correct any more due to possible length issues as this was a zero deck motor and we searched for these for a correct length. It will need to be remeasured.

    Thanks,
    Marion
     
  2. toolmanmike

    toolmanmike FABO MODERATOR Staff Member FABO Gold Member

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    How do the rockers oil on the Indy heads?
     
  3. toolmanmike

    toolmanmike FABO MODERATOR Staff Member FABO Gold Member

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    If the Indy heads oil through the deck to the rocker shafts they won't work on a Magnum block because Magnums oil through the pushrods.
     
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    • RammerJammer75

      RammerJammer75 Well-Known Member

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      Not unless it's an early Magnum or his PRW rockers can oil through the pushrods.
       
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      • toolmanmike

        toolmanmike FABO MODERATOR Staff Member FABO Gold Member

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        Early Magnum?
         
      • RammerJammer75

        RammerJammer75 Well-Known Member

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        Some of the earlier Magnums (92-94 or so) had the provision to oil the heads like an LA. Somewhere in the mid to late 90s Chrysler cut that out.
         
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        • 1994redram

          1994redram FABO Gold Member FABO Gold Member

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          Magnums up to 1995 had the LA oiling holes. They weren't used on the magnum heads. But the block was drilled for it.

          I have a 1994 5.9 in the garage and a 1995 5.9 we built for my dads truck. Both of them have oil holes. The 1996 5.9 in my dart doesn't have the holes. There were quite a few small changes made to the magnums in 1996.
           
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          • mario03srt

            mario03srt FABO Gold Member FABO Gold Member

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          • vitamindart

            vitamindart Well-Known Member

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            hollow pushrods are just part of it, the rockers need to be set up for oiling from the pushrod.
             
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            • mario03srt

              mario03srt FABO Gold Member FABO Gold Member

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            • mopar65

              mopar65 Well-Known Member

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              • str12-340

                str12-340 FABO Gold Member FABO Gold Member

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                LAX heads on a Magnum are a terrible idea... you should send me a PM and I'll buy them from you :lol:
                 
              • mario03srt

                mario03srt FABO Gold Member FABO Gold Member

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                mopar65, The magnum head is a pedestal mounted rocker not a shaft mounted arrangement as on the LA setup. Thanks.
                 
              • mopar65

                mopar65 Well-Known Member

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                Hi yes I know that. I was trying to say that you can use LA heads on a Magnum block as long as you Use Rocker arms that will do push rod oiling.
                 
              • mopar65

                mopar65 Well-Known Member

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                Here is a pick of the trickflow head on my 5.9 magnum motor.

                Screenshot_20201004-115448_Facebook.jpg

                20200711_202158.jpg
                 
              • mario03srt

                mario03srt FABO Gold Member FABO Gold Member

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              • mopar65

                mopar65 Well-Known Member

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                LA Design
                 
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