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    Changing omc upper gear ratio?

    Hello, I have a 1989 omc cobra..5 liter ford. Upper gear ratio is 21/17 in the outdrive. One of the gears chipped off...causing lots of problems. The case is now gauged around the bearing...and I will need a new case and gears. Question: I have a buddy with an old 1988 omc cobra drive from a...
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