Changing over to a wheel would be pretty simple. The tiller attachment point would stay, and be the emergancy steering if the wheel linkage was lost.
BUT, I would not rule this boat out due to a tiller, the wheel in these boats takes up a lot of cockpit room, so when at the dock, you raise the tiller to the back stay, the area the wheel takes up, is not sitting room, increasing you ability to go from 3-4 in the cockpit to 6-7 very comfortable.
A draw back, there are a few less options when it comes to self steering mechanisms. BUT< the feel with a tiller is much better than a wheel as to how the boat is handling etc too. You are also limited to a pretty small wheel diam of about 20-24 maybe 30".
Also 34KE is pretty reasonable for that boat. Do watch and look for one issues that hits a lot of us with jeanneaus of that period, the foam backed vinyl hull/ceiling liner rots, ie foam, falls off and needs to be replace thru out. Not an easy task, but doable.
She drives me boat,
I drives me dinghy!