Bought a boost gauge and needed to know which is the vacuum hose???

thanks in advance

 

Right of the motor (from the front) against the firewall, you'll find a vacuum line with a white or yellow plastic piece on the end and a rubber cap. Remove the cap and tap in there. That's where the L's stock guage hooks up. Then you can run your guage line thru the rubber plug on the firewall, located right below the connection. It comes out behind the pedals.

 

thanks a ton. would have never figured it out myself