Lots of talk about syncro diffs, I have checked the FAQs, the archives
and listened to all the recent talk:  I have 3 questions:

1)  the PO removed the diff-lock-servo from the tranny as the
    connection from the servo to the plunger-pin (in the tranny) was
    broken.  Is there a manual way to hook this up?  Like using a
    choke cable from the dash to the tranny plunger/activater pin?

2)  The hoses to the vacuum balls were whining, so I removed the Y
    connector and corked the hoses with golf tees.  Am I doing any
    harm?

3)  What is the advantage of a vacuum activated diff-lock over a
    mechanical push-pull cable??

  Thanks,Malcolm S