QUOTE(bbrock @ Dec 27 2018, 11:07 AM)
The only serious challenge is getting the new wire through the firewall as fishing wire through the snorkel is a little bit of a challenge even with the harness out of the car. I'll bet you could do it though by popping both ends of the snorkel loose and then fishing a stiff wire through to pull the new wire through with. That's essentially how I fished the defrost harness through on mine but with the luxury of doing it on my family room floor instead of cramped under the car. Probably wouldn't be too hard with the engin out though. Of course, drilling through the firewall and installing grommets for a separate entry point would be another option. Once you are through the firewall, easy to lay a new wire parallel to the main harness all the way out to the fuel tank area.
The drive train and the interior are currently out of the car, so the process
should go fairly well. We'll be installing the new SS fuel lines a running the additional power conductor at the same time.