Changing the boost guage

[TurboTer]

I know adding a boost guage is a piece of cake, but where exactly is the boost line on a 1985 GN? My car doesn't have a diagram like my old '87 did.

 

[mybuick]

i used the fuel pressure regulator vacuum line and spliced into that.

 

[EyeTalk2Trees]

there should be a un-used port on the intake itself. Its on the front side, right next to the water temp sensor. I took this plug off and ran a compression fitting (autozone $2-3) and then routed the line. then run some mechanical guage line (usually clear tubng, $5). I'd go with a copression fitting than a hole clamp, less chance of it blowing off. Its great because the holeis a standard size fitting, just like it was ment to be used for an aftermarket guage.