LS1 re-wire/clean up

[Bodied67]

Hey guys, looking for some help here and some direction before I move forward, hoping this is an easy task and would love everyone’s input!

The way the previous owner just laid the harness against the firewall behind the motor and how he mounted the ECU always bothered me, just seemed as if there was zero thought gone into it, and it drives me crazy.

With that being said, I would really like to clean this up, and try to hide these wires a lot better to show off this sweet little swap it has.

Listed are some pictures of where I stand at the moment. The ECU is mounted pretty much right behind the motor under the dash, and the harness is then ran through the firewall pretty much behind the pedal. You can see where it comes out and immediately tucks behind the motor. Everything was just kinda stuffed back there, zip tied, and hung off the back side of the ECU bolts.

Question is, how would you attack this to clean it up? Frankly, I’m slightly intimidated, but ready to figure it out.

Thoughts?