Update: Of course, not as much done as I had hoped, but chipping away.
As far as the ECU goes, it is almost finished. I'm using a GM factory 80 pin connector instead of the Megasquirt DB37's so I soldered 74 wires (2 x 37) onto the MS board. The wires have slip on connectors to go to the back of the 80 pin plug.
ECU 1.jpg ECU 2.jpg
Once I was done, I realized it was going to be a pita to remove the board from the case (if I ever had to), because I'd have to remove 74 wires from the 80 connector to do so. So I de-soldered all the wires and utlilized the DB37 connectors on the board so I could easily disconnect the main connector. I'll bolt the DB37's together, so there will be no chance that they will vibrate loose.
ECU3.jpg
I have the wiring harness measured and strapped to the correct length, but still have to install the pins for the main connector. I received my O2 sensors and the controllers and have to wire those in as well. Final wiring step will be to set up a relay and fuse panel.
I found a free electronic schematic program (TinyCad) and used it to draw up a couple diagrams for my panel and sensor connections. I figured the time spent doing the drawings would pay off come connection/setup time.
TinyCad.jpg