i saw alot of questions about where to find vacuum diagrams here and I recently found an awesome site for just that for almost any vehicle any year. It is at alldata.com They require a $20 dollar membership but you have online access to alot of diagrams and data for one vehicle that you choose for a whole year. I have an 87 bronco with the 351w and I could not find a diagram anywhere but they had it and it matched exactly. I had the diagram and dowloaded it in about five minutes. They even had high/ low altitude varations and under/over 8500 lbs options. I highly recommend it and yes it is worth the twenty dollars if you looked as hard as I did for that damn diagram.Oo

 

Alldata is a good reference , but a lot of people dont want to pay the $20 . If you look at the value its hard to find a repair manual with as much detail for that money .