Hello and thanks in advance for the information. I have a 1967 GTO and on the intake manifold in front of the carb. there are two large vacuum ports. On my car, which is a 4 speed, both of these vacuum ports have are covered with black rubber nibbles, for a lack of a better word. In other words there is nothing attached to them. On other GTO's I have seen in the pictures that there are two large hoses connected to them and they run off towards the back of the engine to who knows where. Can someone please tell me where these vacuum hoses go and do I need them connect on my car. I have seen them on both automatic and 4 sp transmissions.