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  1. 66 impala rear end

    Performance
    hi im new to the site my toy is a 66 impala. im having a motor build with about 370 hrse and got a 700r4 trans. currently i have the stock 10 bolt. has anybody had any problems with these rearends breaking if upgraded to posi and or bigger gears? i probly got 273 or 308s and i know its open...
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