Starting to go through my wiring!

Hey guys, going out in a bit to start in on cleaning up my the under hood wiring in my 71 Demon. I did a few searches and came up with nothing..

Here is a list of things I want/need to do

Relay the head lights - which wires are the high/low head light wires in the harness
Rewire factory electronic ignition - mine was wired with all the same color wire - it currently works but I want to redo it with proper color coded wires
Wire in a Toyota 120amp alternator - I get the just of this as the bracket came with a wiring diagram, but where can I tap in for 12v switched power (key off = no power/ key on power)

Any help is greatly appreciated - I am going out now to inspect it and remove the convoluted tubing in put on it 10 years ago ahaha - will report back

Forgot to add car is a no option 6cyl car, being converted to a big block using the 6 wiring.. that has already had electronic ign. in it..