[Fry]

wheres everyone goin thru the fire wall w/the wires for extra gauges? truck is a 6spd. pics would be helpful

 

[TVtruck]

There is a rubber grommet where the steering arm goes through the firewall.....thats the best place to run them....sorry....no pic's

 

[Fisherguy]

I ran my wiring for the gauges through where the factory harness is, brown cable for pyro and a bundle taped together if you look closely at the back:

My truck is a stick, later after more mods I ran more wiring through an empty grommet, in the following picture the grommet with the grey cable is unused, if your truck is an auto this pic shows you a good spot to use, where the arrows are:

Here's a good "how to" link for installing gauges:
Gauge Installations at DieselManor- 2003-2007 5.9L Cummins

 

[Fry]

thanks very helpful