There is a vacuum line cluster on my 91 5.0 When removing the engine I broke a couple of them. They were brittle and broke by barely touching them. Anyway, I cant remember where they all went. These are four white plastic lines. Some ( I think two) went to the smog pump which is gone now. One goes to the intake I believe. Can anybody tell me where they all go. I did a bad job of labeling during disassembly. Thanks.