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This is a hard to find Oldsmobile 442 12 Bolt O Type posi. This #672 posi is for GM gears 3.42 and up. This carrier is for 31 spline rear ends. Yes you can use it in a 28 spline rear but you have to use conversion bearings and custom axles. Unit has been blasted and rebuilt with new clutches/spring. Ready for install. $800 shipped lower 48.
