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  1. C

    Phanton 4-75 cubic inches

    Was the phantom 4-75 162 cubic inches the same as my 70 horse gray. Anybody ever see these with twin downdraft carbs? Maybe used on the Fireball 4 engines?
  2. C

    GM 3.0 to stright marine drive

    Have a small plywood inboard (Correct Craft, Atom Skier) powered by a Gray marine 70 hp flathead 4, would like to increase power without butchering the hull. Was thinking a 3.0 Gm based 4 cylinder of 120-140 hp would give me a nice power increase. I know theses engines are used in many IO...
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