What is the difference between the under the dash duct work of a 68-72 Nova with AC and one without AC. My parts car is an AC car and the car body I am putting the stuff in is a none AC car. I want to make sure it is all going to work. I think the kick panels are already going to be a problem unless I create a plug on the passenger side, but then I will not have any air vents coming in on the floor. If all this stuff isn't going to work should I look into trading if for stuff that will or would I be better off selling it and buying stuff that will work. All the origional duct work is in surprisingly good shape considering the condition of the car. Also will first gen Camaro stuff interchange with 3rd gen Nova stuff?