Hello i was told in order to remove my thumb wheel radio out of my 1969 GTX i need to remove the duct work for the air conditioning that feeds the center dash vents see pictures i was looking threw all the post and have not had any luck finding anybody that can give me some kind of a guided direction on how to remove the duct work do i have to unbolt the part that has the ducting going from left to right it looks like this part also feeds the center dash vents. Any help and guidance on how to remove this part comes out so i can get my radio out would be greatly appreciated.