Installing gauges, best way thru firewall?

[rumblefish]

Hey guys, I'm in the middle of a boost and pyro gauge install, and was wondering what the best/easiest way thru the firewall is. My 91 has alot less holes in it than my older Ramcharger does. I know the correct way would be to drill it and use a grommet, but with my Ramcharger i used grommets that already existed. Any suggestions? TIA... ?

 

[CMayrant]

Not wanting to drill and use grommets because I was too lazy to drive to the parts store to pick them up, I went through the large grommet that exists between the master cylinder and the left fender. There is plenty of room for several wires around the edges of this large grommet.

 

[Moab4x4]

With a drill. :-laf

sorry, couldn't help myself there... .



On my auto truck, I used the large grommet between the master cylinder and the left fender. When I got the 5 speed I then understood what that grommet was for. That was the location of the clutch master cylinder. I had to find a new place for my wires.....

PO had drilled and siliconed the wires in one spot.

I drilled half inch holes and stole some half inch body plugs from the interior of the old cab to use as grommets.

 

[rumblefish]

My truck is a stick, so my grommet between the master cyl. and the fender was occupied. I was digging around and remembered the PO installed aftermarket criuse when he swapped to a tilt column, and stuck the wires through the big grommet on the pass. side of the master cyl. Made the hole a bit bigger and shoved the new stuff through.