dash and heater interchange

Some are a some aren't. It will depend on the two years and models involved. A '72 Dart, Valliant, Duster Swinger, Etc are all the same. The '71's are not....there are 3 different ones that year. The 340's had one dash, the non-340 Valiant/Duster/Scamp had another, and the non-340 Dart/Demon/Swinger had a 3rd. What exact vehicles are involved in the swap?