I finally got off my ass and started tackling the wiring.
I bought a new (used) switch for the lights.
It turns out the 74 is the bridge year from the old and the new style lights so it took me a bit to crossreference 75 and up with my 74 diagram to get it. Also the relay for the lights on the diagram is in the column. When I pulled the cover off a dirt dobber had built a nest in the switch.
I got it cleaned out and cleaned the contacts and hunted down the grounds and boom. I have lights!!
Well. Not exactly boom. It was more a slow rumble. I muddled through it in about 2 hours.
The blinker relay is still under the dash and clicks once when I pull the hazards. This aftermarket was in there with scotch locks and I removed it. I'm still trying to sort this out.
After that I started in on the tail lights. I am pretty sure I need to know they are functioning to ever get the blinkers right so I looked into why they are not right.
Sure enough, it's a mess under the guards. Scotch lock for days and broken wires. Dammit. More parts to order.
It's amazing how these things fight in the end when you have a date you are shooting for to complete them.