I'm also digging up articles on others install and so far I am 50/50 on inside and outside installs
("Quote from HotRod Mag Install on a C5 Vette";
"The Vette Doctors route the harness, as well as the braided steel nitrous hose, from the rear area where the bottle is mounted toward the front of the car along the passenger side, completely hiding it beneath the carâ??s plastic trim panels.")
Yet another guy with an RX7 ran his ZEX kit outside.
I mean are there really issues with running it inside I can reroute it if so, the RX7 guy ran his with his SS brake cables down the line and put them with them which is protected.
What I had planned on doing is running the n2o wires for the venom kit through the same hole, both would have heatshrink on the n2o line and on the cables keeping them seperate, then a big piece of heatshrink over both of them, a rubber grommet where I cut the hole sealed with silicon then, fill the hole with silicon to seal the wires and such in but not touching the wires just the heatshrink.
Since I am running it under the wiper cowl you can see down there I was going to heatshrink the whole wire area until it comes to the engine and seal it in the existing grommet I cut out the center of.
You will have to see pics to see what Im blabbering about