Steering Box Universal Coupling Sizes

Those manual boxes were all the same diameter on the input shaft.....A, B, C, E, B-van. All of them are the .723 diameter. The power box has the small diameter shaft at .625. The pitman shaft changed diameters in '73 to the same size as the '65-up C-body power box and '73-up A,B,E,F, etc power box.