My '69 barracuda has power steering that I want to replace with manual steering. I have a steering box but not a new column. I do have an old '71 Dart manual steering column. Can I remove the steering shaft from the '71 column and put in in the '69 column to make it the correct length?

Also, what years had the small diameter spline for the steering gear box shaft and what years had the large diameter shaft? My power steering gear box is large, the manual box is small.