Whatever you do, get rid of all those colors! Yellow, red, blue, pink, arghhh1!
Looms and hoses should be black. All else looks like crap. I hate yellow plug wires. Plug wires are not the center piece under the hood. They don't need attention. My advice is pick a theme and stick to it.
Is there a vacuum line routing diagram under the hood? There is supposed to be one. Including where the PCV valve and breather should be.
Find your wiring diagrams and start tracing:
http://www.austinthirdgen.org/index.php?pid=19
YOu can also find diagrams in service manuals and the autozone website and alldata
BTW, photobucket has a nice thumbnail option. Just saying.