I am finishing up my front mount turbo.

How do I connect the vacum line off of the valve covers?
Should I just tap a fitting on to my air filter?

Is there any other vaccum lines that I need to change?
Thanks

 

Are you asking about a boost reference signal hookup or some type of crankcase EVAC system?

 

Vacumm line, evac system and if I should change any other lines?

 

Did you buy a particular system or is this home built? Need more information on your set up.
EVAC system may be needed if you are pressurizing your crankcase from ring blow-by.
The vacuum line is strictly for the waste gate or BOV signal. Two completely different things here.
More will chime in on this, got to go to work now.