I'm not sure on the vac line best tap point. I would drive the car for at least several days to make sure it is working correctly. I don't have my car around to look to ck, I 'm in OKLA and car is in Houston. Look on the forum and do a search for vacuum hookup or Vac tap point. There are drawings of hose connections in the service manuals. Someone else maybe able to answer you , I have not looked at those areas in over a year.