74 duster power to manual swap questions

I'd like to switch my Duster from power steering to manual, my brother has a manual steering box from his 72 Dart Swinger that I could get. Will a 72 box work on my 74? What will I have to change as far as steering linkage and colum ? His car had power steering originally but it was street raced in Detroit and they put manual in it and theres 2 couplers welded together on the input of his box, what can I do about that on the CHEAP ?