Manual vs Power Steering Shafts

I have a 74 Duster and knew there differences with the the steering links, pitman arms and tie rod ends. Also the power steering boxes have 1.25 sector shafts as opposed to the earlier models 1.125 shafts. I maybe mistaken, but all the manual steering boxes all have the 1.125 shaft which means I'll need a 74 pitman arm to fit the 1.125 shaft?
I picked up the power to manual adapter and when looking for a rebuild kit for the connection I find out that 73 back power steering connection is 3" long while the later ones are 3.5" long. Would that mean that mean the 74 PS column is shorter than earlier years? Or is the position of the steering box further away as the K frame with the spool mounts a change from 73 on? I know I can solve the problem, but it gets ridiculous sometimes.