I need the ducting for an AC 77 trans am. The only parts I have are the Y defrost piece and the small elbow duct that connects to the passenger side and the driver's side vent. I do not have the links that go to these vents, I do not have the elbow/piece (whatever you wanna call it) that connects the center dash vents to the ductwork box. Do you have all the ducting I need? I saw some on a shelf there.