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No one is mentioning what gear set they are running? The 23 spline has a narrow, standard, wide and overdrive gears.

I have a 2.47-1 and a standard 2.66-1 and working on getting good parts together for a 3.09-1 box.

Does anyone know if the OD input shaft is the same as a standard 3.09-1? They are both 22 tooth...Tim

The late coarse pitch overdrive input is the same as the old 3.09 input but the '75-7 overdrive input is different.