Power to Manual Steering spline differences

So is the manual box here, from the 63 Valiant, the exact same as a stock Manual gear from a 72 Duster?

Yes I believe they are all the same except for the Large sector ones which by the pic yours is not .I recomend you do a search for threads on P/S to manual conversions there's a lot of them.I did the conversion On My Dart a while back I ran the adaptor piece till I located a Manual steering column.