I'm so glad you are back to posting Prop ... feels like all is right with the world again
:icon_thumright:....Thanks, and have no fear tallhair, I stayed at a Holiday Inn Express last night.
No problem Speedfreak and to answer some of your questions, for a straight line single wire for positive coil, all you need to do is make sure the brown wire and the blue w/trace splice together. That unified wire runs to your Pos coil terminal. The red wire off your distributor also runs to the pos coil terminal, and the black to ground. With that being said, I hand built my harness and ran the wires straight to where they needed to go. I'm picking up on that you do not want to modify your harness like that, but connect the wires up in the harness to do basically the same thing, but keep it the way they were strung out in a factory orientation... If that's the case, the answer is actually looks to be pretty simple:
That blue w/trace wire comes out of the fire wall, runs the harness and ties into same plug connection at the voltage regulator as the solid blue wire that runs up to the ballast resistor, which is the one that is lying on your pinky in your top pic above. So, if you connected that solid blue wire into the brown and blue wires that run into the other connector, you should be good.
The other solid blue wire that goes into the same connector as the brown wire (that's resting on your middle finger), is the wire that leads out and hooks to the +POS on the coil. Confusing yet?...lol The meat and potato's of it is, your +12V Key to start (blue w/trace) already ties to the blue wire that connects to the ballast resistor. So, no need to splice the blue trace into the brown at the firewall if you just go ahead and connect those three wires in your hand all together. Because now from that point you have you 12V key start signal, 12V key on signal and the wire that will feed the POS coil (Blue-seen in your second pic) all tied together. Easy enough? And again the red and black wires from your distributor go to the POS and NEG on the coil. You would need to keep the blue w/trace and solid blue wire that connect together with a terminal connector (and would have hooked to the factory voltage regulator), intact. Wrap them up good, don't want no arc's.
As far as your question on the black wire and purple horn wire, If retaining the factory harness I would recommend what MAD electrical shows to do with that (link below). You're going the route of running power to the battery (different then MAD's drawing), but still would be eliminating the factory black wire from the alt.
Again, if your retaining all of the factory harness your pink could be hooked to the alt for the horn relay. Last but not least, test it all out before wrapping everything up. If you have a small 12V lawn equipment, hobby or motorcycle battery take a chunk of 10 gauge wire run it to slot J on your bulkhead connector. Also ground the battery to your chassis. Take a voltage test light or multimeter, have someone hold the key to start quick, make sure there's voltage at the connector for POS coil...then do the same with key to run/on.
http://www.madelectrical.com/electricaltech/amp-gauges2.shtml
Good luck man......I'll be offline tearing up the snowmobile trails and causing trouble this weekend, but will swing back in Sunday night. I'm sure you'll do great getting her all plumbed in.