Can I remove my steering box and shaft in the column as one piece and replace it with a 1" DD shaft with no Steering Box on the end of it so I just have a DD shaft exposed in my engine bay? Or is the end of the stock shaft where the steering wheel is threaded/splined?
Not exactly sure what you mean by dd shaft. (could just be brain dead this am) The 66 steering box and shaft are one piece and 3/4 inch.
Are you asking if you can convert it to a 68 style, with a rag joint type setup? You won't be able to use a 66 box that way unless you have a 66 steering box converted to a 1 inch short sector shaft by the guy at stangersite. You can't use a 68 steering box because th pitman arms are not the same and I don't know what will happen using a 68 pitman with the rest of the 66 steering components. (I actually did have a box converted for that purpose)