You can - but the steering wheel would be several inches closer to you (it has been done). It is probably possible to get the shaft cut down and resplined, but it would not be cheap. (I wonder if it would be possible to get approval to cut the shaft part way down, take a bit out, and join it with a keyed sleeve and pinch bolts in grooves turned in the shaft. The machining on this would be a lot cheaper, I would think, although if someone has the correct broach for the steering wheel spline, shortening it should be reasonably cheap.)
John

