Hemidenny K member club?

OK guy's need some input,Car-70 Duster-Engine 5.7 and then some-stock k-frame about to do surgery and add my HDK,Right now close ratio flam. river Manuel box,
so here is my thinking,I really have no problem with the Manuel steering BUT since I'm going rack and pinion I've been thinking about adding a power rack????? I don't know if the mustang two racks will work with the stock power steering pump?? Does anyone have experience with how a front steer rack and pinion steers compares to a stock manual box as far as effort goes and does it change things with the fact that the rack is front steer?????? So any input I would appreciate --Steve