I figure this will be the best place to ask. I have a factory service manual and it doesn't have the vacuum diagrams. I have a buick 3.8 I believe e it was out of a late model olds, I will be putting it into my 81 Malibu. The only problem I'm running into is that the engine was mostly together except some vacuum hoses were disconnected or missing. I posted a picture of what I have, the part with all the lines sits on the valve cover and I guess controls all the vacuum hoses. The engine has egr and the exhaust butterfly valve in the manifold that is controlled by vacuum
