Thought I should post a quick update, managed to work out the necessary wiring for the engine so working on making some nicer looms. Put some pics up in case anyone was wondering the steps.
Cut and crimp the wires and add heat shrink to keep them bound:
Add metalic overbraid
Add heatshrink to keep braid in place
Finally add some woven braid over the top (I prefer nomex but kevlar is fine)
I used the above on the two connectors needed for the ECU:
My new favourite toy is a label printer which prints directly onto heatshrink:
And if you really want to go over the top I laced the new rear lights/number plate/fuel pump loom: