I bet the thing you are talking about says B P T somewhere on it, it is the back pressure transducer. It should have a line out the bottom that goes to a steel hard line coming out of the EGR valve's exhaust side. The rest is marked on it, it will have a port marked carb and one marked valve. The one to the carb actually goes to the thermal valve on the intake, and then to the carb.
Oh and yeah, I do have the vac routing commited to memory.
There was a post someone did here with pictures of the vac routing. Search for "vac routing diagram" or "vacuum diagram" or something like that, I would do it but I'm feeling lazy tonight.