You might consider one of the new-design electrically-assisted steering systems. It might be a simpler modification than replacing the steering gear, mounting a pump, running hydraulic lines, etc. There should be plenty of them in salvage yards and a little internet research will probably turn up what's necessary to do the conversion.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!