This is just my humble opinion. If I were to install a lighting kit I would take power directly from the battery and install a inline fuse 12" from the battery connection. Alternately you could tap into the constant 12 volts on the ignition switch wiring harness and again put a inline fuse no further than 12" from that connection. I assume you will want to mount a seperate switch for turning the lighting on & off. If so then I would order a factory switch like the tow mode switch and install it in one of your blank switch spots. You can simple rub the words tow mode off of the front of the switch. It would then look very custom. There is a rubber grommet in the firewall just above where the hood release cable runs thru the firewall. This can be used to run your wiring in& out of the cab. Also it's always good pratice to use electrical tape and wire harness loom to protect wiring and preventing shorts as well as opens. Hope you find some of this useful. 
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Steve - "A Rumor Is Nothing More Than An Unconfirmed Fact"
20" Boyds, Running Boards & E&G Classics Grille, Pace Edwards Electric Tonneau,
Clifford RSX 3.5 Alarm / Remote Start, Sirius Radio, Drop-in K&N, Factory Hood Protector, Carbon Fiber Dash, Backup Warning Sensor.
Future Mods - Dual Exhaust, Headers, SuperCharger!!!
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