VINTAGE 1957 1958 OLDSMOBILE PONTIAC POSI TRACTION CENTER 12 BOLT

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VINTAGE 1957 1958 OLDSMOBILE PONTIAC POSI TRACTION CENTER 12 BOLT:
$456.00

THIS USED POSI UNIT WAS FOUND IN AN OLD GARAGE CLEAN-OUT THE ONLY NUMBERS THAT I CAN FIND ARE 946 C30 ARM STEEL LOCATED ON THE OUTER WEB SIDE OF THE RING GEAR BOLTS . THE UNIT IS A 29 SLINE UNIT AND ACCORDING TO HOLLANDER INTERCHANGE THE 29 SPLINE AXLES WERE USED IN THE 57 AND 58 VEHICLES.THERE IS SOME SURFACE RUST ON THE BEARINGS.THANKS FOR LOOKING