Power to Manual Steering spline differences

I have taken out my 72 duster power steering gear to replace it with a manual box. The box is from a 63 Valiant and is in excellent shape. The input shaft on the 63 box is 100 thousands wider then my 72 power gear. Does anyone know if somebody produces an adapter for the difference in the spline shafts. I would like to use my current column if possible. Also, is the larger, or wider shaft only found on manual steering cars?

P6106715.jpg