Streetgrinder

I have a 1985 22R that has some messed up vacuum lines. The charcoal canisters are connected together, but don't T into the VSV. What is connected to the VSV is down low on the passenger's side, and looks like a vacuum switch. It's round and has one line connecting it. I need to find out what that round thing is connected to. That area is vague on all the diagrams I have. I'm going to try to get a FSM. Is there an online source for detailed digrams?
update: I found FSM downloads here on yotatech. I managed to clean off the hood diagram and unsquangle the vacuum lines. Result: truck is running like "buttah"!