This is a picture of the passenger side of my gf's 79 GMC K15. It's got a new 350 with th350 and quadrajet. This is under the air cleaner and on top of the intake manifold. You can see the orange plastic piece around the fitting. As the title states, anybody know what vacuum line is supposed to go here? If it's not important should I plug it? Sorry about the quality, I don't have a camera, only a 1.5mpex cell phone.