Steering gearbox interchange

Howdy folks,
My '72 Duster came with power steering (about the only item under the hood, actually). Will the gearbox interchange with any other models (non A body)? I have an '88 Grand Fury parts car, would this work? I'm looking for a faster ratio. What about the pump? Would the Fury's PS pump work with the Dusters gearbox? Since I am driving the Fury, I know these parts to be good...
Thanks,
C