Thank's for the reply, I capped the vacuum line at the switch(Advanced Auto / Dorman part #47389 1/8), after speaking with John over at Laborghinitalk.com (great repair tips). According to him I don't have stock exhuast and as you stated someone didn't complete the job.I Couldn't take it for a test drive (Mother's day).

My wife just purchased the car for me and I'm wondering what performance issues it has suffered with the vacuum line open?

I have noticed an issue with, what I believe is the mixing door (making the drivers vents colder than the passenger's as well as hesitation and a sucking sound when shifting from 2nd to 3rd(getting on it of course). It would be great if this $.40 rubber cap could resolve those issues.