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  1. D

    Identifying Differential

    Hey all, I have a leaky axle seal at the passenger side rear axle flange so I want to replace it, but I want to make sure I get the right ones. I looked online and autorestomod made a video on identifying 9inch and 8inch diffs  but mine doesn't fit the description or the example they have on...
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    Recommended Performance Motor Swap

    Hey all, This might be heretical to suggest, but my shop mentioned that my 429 in the 71 seemed to be a little weak and I've been giving some thought in replacing it with a new performance motor of some kind. Probably would replace just about everything at once, motor, drive train, suspension...
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    General Engine Performance Questions

    Hey all, I just recently became an owner of a 1971 Mach 1 Fastback back in April. I've been going through a few repairs and just generally getting to know the car and thought I better ask the community for some of their wisdom. So for starters, my Mach 1 has an aftermarket "Performance"...
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