A quick update so you don't think I haven't been doing anything.
WIRES WIRES AND MORE WIRES
The last two weeks I've been spending a hour or so after work stripping back the stock wiring harness. The amount of time spent on this would be 15-20hrs, which in hindsight is an awful lot of time and effort, however there was an incredible amout of wiring to be removed. The highlight to me, is that through it all I only cut one wrong wire (an earth wire, so not really a problem), and the car still starts and all critical functions still work. There is still a bit more to do in terms of tidying up the wiring, but as I'm planning on relocating the battery I'll wait until that is done before I tape the loom back up. I haven't weight the wiring removed yet, but have it all bagged up ready to do so.
The next step is dry ice to remove the sound deadening.
PICTURES
Remaining boot wiring
All the passenger side harness is removed
Remaining ECU and instrument wiring
Fuse Box with alot of relays removed
Engine harness stripped back