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Thread: 392 replacing a 404?

  1. #1
    Join Date
    Feb 2013

    Default 392 replacing a 404?

    We have a 1980 S-line 1600 grain truck that came with a 404 and a 5speed trans. The motor is done, but a 392 is available. Will the 392 connect to the 404's bell housing? What about the flywheel from the 404? Will it bolt to the 392? Motor mounts can be fabricated, but the transmission connection has got to work or we're hooped. Thanks

  2. #2
    Join Date
    Feb 2009
    Aiken, SC


    The bell housings do not match. It is likely that you could find the right bell housing, though.
    The flywheel on the SV series is weighted to balance the engine, so the flywheel would not work on the 392, either.
    Allan E.
    Curmudgeon Extraordinaire
    Charter Member, Old Hippie IH Club
    Old fashioned binder freak

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