There is usually enough room alongside where the wiring harness passes
through the firewall, also alongside where the heater/air goes
through. On some Ford trucks there was a rubber plug in the floor
behind the drivers seat. Also if you have an on-the-floor shifter,
that's also a good spot to pass a pair of wires. If you have to drill,
do it if possible on the side kick panels, then route the wires into
the engine compartment from the wheel wells...

Bob N9LVU


Bob, some of that info above may be applicable to my vehicle. I'll
have to get out there and dig around some more to see what the best of
those options may be. Thanks.

Ed