Steering column shaft

I have never taken a mopar steering column apart, and I was wondering, I'm working on a 67 dart with manuel steering, my question is what is the diameter of the shaft? Seeing if it's possible to swap the inner shaft to be able to shorten the outer column inside the engine bay, and add two universal joints with a chrome moly shaft both inside the column and ib the engine bay to give me a little more room to clear the twin turbo set up I'm working on. Make more clearance for the down pipes. I measured the tube I have and it's 0.748". I know there's a top snap ring and just the support bearing and the bearing at the end of the housing. Am I making sense???