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  1. I

    excessive black smoke...

    Last fall I purchased a 1985 F250 with NA 6.9(just for the engine). It is a high-altitude model(158 HP) by the sticker on the valve cover. I live in Colorado and a friend of mine is going to be using it a few months to tow a 6000 lb trailer around locally. It will be used from 5K feet up to...
  2. I

    White-Hercules DT3.7

    Anyone here run one of these? Ken
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