ok first off i did try to search for this and the dang diagram they give you under the hood kinda suck....but yeah, which line would be the best choice to tap into for a gauge?? thanks for the help or laughs, which ever comes first....

 

no laughs i was pulling hair trying to find them ha... what i did was found a line on the driverside near the firewall that had2 rubber connectors close together... pulled the hose that connected them together out and installed the "t" fitting in those two rubber connectors...

i might get some pics for you if i feel up to it...

 

dose anyone have picture of the vacuum lines?? that would haelp a good bit .....the for diagram sucks.....

 

The under hood diagram usually shows the manifold vacuum source as a hexagon.

The easiest way to find the source is to start at the black spherical vacuum reservoir under the air filter box and trace the thin black plastic vacuum line all the way to where it is tapped into the intake manifold. Then tee the vac gauge line into it as close as possible to the manifold. That will give accurate vacuum readings and fast gauge response.