73 dodge dart sport dash frame interchange

I am going the other way as I purchased a 72 duster dash frame to replace my rusted out 73 sport dart dash frame. One thing I just noticed today is that the center bezel area is different. The rectangular opening for the vent controls on the duster dash frame is a little smaller than the sport dart's. The sport dart bezel overall is the same dimension but the recessed area for the vent controls will not fit into the hole in the duster dash frame. The sport dart is a non ac car if that matters.