I ran mine under the drivers door sil with the factory wire harness. hard part was getting the wire thru the sealed connector inside the trunk to follow factory wire harness. About 4 hours.
Got it done today. Took about 40 minutes total including the consumption of a single Heineken. I ran it along the frame on the drivers side right with the fuel line. It's pretty stealth and looks like factory under the hood which is good for my GNX.
One thing I noticed quickly was that it raised my O2 volts from a dangerous 660-670 at WOT in 3rd, to a more comfortable 770-780 at WOT in 3rd. With a little tuning on the Scanmaster, I might even be able to raise my O2 voltage even higher and get to run a little more boost .