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rear end numbers

  1. Need Help Decoding Rear End

    Tag Team
    Newbie here, That said... I need help decoding the rear end numbers... This is a 1961 4dr sport sedan.. On the drivers side numbers are A171 cast then 3725899... on the passenger side the number are stamped into the housing are AW 124 and lastly at the top of housing in larger letters is GM...
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