Stop in for a cup of coffee

Hey if you go from a power steering box to the manual are the pitman arm shafts a different size? Have a guy that wants the box from the belve and wants a 1.2 in shaft not a 1.1 which this and every one I have seen has. No idea why?
there is a big and small shaft powersteering box, i have one of each sitting here. I learned it the hardway.....