Max Torque Big Block

Big Block A body Tech

  1. Slowswinger

    Slowswinger Well-Known Member

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    Where are you finding used cummins engines for that price?
     
  2. dukeboy_318

    dukeboy_318 Our Lives, Our Fortunes and Our Sacred Honor. FABO Gold Member

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    All over my area
     
  3. Jesus Chrysler

    Jesus Chrysler Forgiving Sins Against Mopar Since 1983

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    One thing to keep in mind with a Cummins swap is weight. They’re 1100 lbs and IMO the pre 90 dodge truck platform is not properly set up to handle that weight. I had an 89 CTD that tore the LCA Mount right through the rivets. I had noticed cracking around the rivets but didn’t think enough to do anything about it. My friend with an 89 CTD had the same cracks at the LCA mounts. My fix was to buy an entire front chassis from a 91. They redesigned the front cross member and LCA mounts to be a single stamped piece.

    Just a thought. 6BT is an awesome engine, but it’s also a heavy pig.
     
  4. mbaird

    mbaird mbaird FABO Gold Member

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    Coincidentally someone just posted a rebuilt 6bt and 4500 trany for 5k on craigslist here.
     
  5. PRH

    PRH Well-Known Member

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    IMO, The problem with the aftermarket heads for this type of application is that the ports are bigger than stock, and so are the valves.
    Neither of those two things are going to be desirable for high load, low rpm situations.
    The only “good” way around that is add a bunch of cubes so the proportions between the cylinder size and the port/valve size don’t get skewed too far out of whack.
    Of course, the stroker kit and heads makes the motor cost about twice as much.
    I’d probably risk it with some stock heads myself.
    I’d look for some 516’s that didn’t have a ton of core shift.
     
    • Thanks! Thanks! x 1
    • Jesus Chrysler

      Jesus Chrysler Forgiving Sins Against Mopar Since 1983

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      100_4422.jpg

      Here’s my old 89 CTD that broke
       
    • Slowswinger

      Slowswinger Well-Known Member

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      I don't recall seeing any high mileage used 6bt on craigslist for any less around here. You could just about buy a whole used pickup for the same asking price.
       
    • mbaird

      mbaird mbaird FABO Gold Member

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      92 5.9 Cummins w/nv4500
       
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