Vacuum lines on my Zeniths Carbs keep blowing off an my Tach is going haywire too

[Dirty Marty]

Greetings Pelicans.

I just started to get back into my 70 911T after a long time dealing with other things and took it out for a drive...... Was running fine despite having sat for about a year. But now one of the Zenith 40 TIN carbs is popping off a vacuum line occasionally on the right bank and my distributor (Marelli) is making my Tach bounce from one side to the other occasionally as well.... the car actually quit once but started backup.........What should I be looking at for each of the issues.

Any help would be appreciated.

Dirty Marty
Fallbrook, Ca