With a little tinkering a hydraulic boost rack & pinion should be able to be used with a powered input shaft. Just do a little plumbing to allow a small volume of fluid to recirculate side to side to keep the pistons lubricated. Then a unit for a heavier vehicle like a mid-sized pickup could be fitted. Whatever rack is used, pay attention to the width of the inside tie rod pivots. They need to be very close to the width of the lower control arm pivots to prevent bump steer.
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!
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