I am trying to install my mechanical boost guage where would be the best spot to get through the fire wall??

 

if at all possible I would try going through an exsisting grommet in the firewall. If not. Make sure you find a place that is easily accessible from both the inside and out. Near where the steering column goes through the firewall maybe?

Make SURE you use a grommet,silicone, or whatever to seal up that hole!

 

any suggestions as to which existing gromet I might try???

 

Should be aload of wiring and a grommet that is right under the dash near the brake pedal already.

 

the grommet that has the tach wire and ECU harness running through it, on driver side. piece of cake. just take a screw driver and pry an openning, then stick a wire through

 

don't drill!

with a little effort you should be able to squeeze the hose through an existing grommet. You're using a very thin plastic hose, right?

 

Underneath the hood, right by the clutch MC and the hood hinge. Huge grommet. Just slice a hole in the side with a knife and run whatever you need.

 

This truck is automatic and I dont see any where that there is wires going through the fire wall except on the far passenger side ??