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Ive installed GM Power Rack & Pinion to my Straight Axle Hudson's then mounted the P/S Pump to the Hornet motor. It was not difficult.. However, '47's are Coil Suspension so need to extend the Steer shaft down to the Rack using a small universal joint with a 3/4" Heim and fabricate a mounting bracket. Rack's come in different widths but be sure to get a Rack from a 'Rear Steer' car.. Might have to shorten or lengthen the tie rod sleeves slightly and maybe make a bushing into steering Arm's...Lastly, Might have to shorten Steering Arms slightly because Rack's don't have the range to turn real sharp.... Can be done but may be a Project..
Additionally, last Yr at the Eastern Regional, there was a beautiful light colored '30's or early '40 Hudson Sdn there that had a Toyota P/S Box that he said practically bolted in, however, I don't recall the year of car or if had a Coil Suspension... Perhaps like Ken U Tex suggested, John Pontius might know more...