heater control cable

i have a 1972 duster non ac and one of the cable is broken i think it is the one that exits the controls on the drivers side i will get pictures in the morning. also the dash frame must be from a later car the 1972 controls and bezel are to small. does any one know if the 1973 and later controls will work with the earlier heater box. right now i am planing on putting a 70-72 dash frame back in it to make the controls work.