The problem with putting vents in the dash is, there's no room to run the duct hoses back there! It's tough enough just trying to snake the defrost ducts into place- imagine trying to fit in another 2-3 hoses.
Hadn't thought about the hoses. Since the center ones would replace the radio, I would guess those would be ok, and the passenger side one shouldn't be hard. But I could see the left DS one being a real pain.
