Any know what vacum line I can use to get a reference vacum to the boost gauge. The only that I see is the pcv valve line and need to put a catch can and some modifications, etc. is that the only option?, Thanks!

 

tap the same line you used from the throttle body that connects to the BPV

 

^ yep ...and tap it as close to the throttle body as possible so you get an accurate reading. Mine is about an inch down line from the tb.

 

In that way, I can read vacuum too?

 

Yes.

 

Excellent..............Thanks!