[OldCreek]

I've got mine installed along the radiator support on the driver side.

Remember, they were originally under the hood in the first place. If you look at the pcm/ecm carefully, you will see rubber seals where the harness connector attaches and rubber plugs that the wires go through to the connectors.

If you take your harness wires out of the looms and reroute them they might reach into the cab... but then again, you could solder on some longer wires for some of the shorter ones.