For this 2008 180 BR 4.3L. how should the blower vent ducting be routed? Mine starts at the bottom port side of the engine then goes directly to the blower and is then connected to the vent out the back on the port side. There is also a piece of ducting about 2 feet long going from the front of the engine bay to the rear. It's on the port side also but is not connected on either end.