Here's a picture of the Hotchkis Challenger's set up for the steering quickener. It's a Coleman unit that's mounted under the dash. It's a little hard to see it, but these are the only pictures I've found of it. There's a thread over at moparts on it where
@autoxcuda talks about it, maybe he'll chime in here. They're his pictures
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https://board.moparts.org/ubbthreads/ubbthreads.php/topics/1163164/2.html
I would think that it could also be mounted to the inner fender right near the steering box, it would be easier that way because you could leave the upper part of the steering column alone. It might require a bracket to be fabbed up for the mount to have the strength required for it, but shortening the column down there would be easier.
Here's a link to the Coleman piece
Steering Quickener, Lightweight, Mini