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  1. J

    Changing gear ratios: opinions/suggestions wanted!!

    I have a 1974 C20 with 410 gears and not happy at all with them. Too much RPM on the hiway. I can only imagine What 456 gears are doing on the hiway. I’m considering the 700r4 but not sure who to take it to for the work. I live in MN.

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