Got the ECU back yesterday. Put it back in and connected it up. Connected the battery and turned the ignition to ON. Heard energizing noises. That was new (and positive). It was evening, so I waited to go further til today.
This morning I hooked the battery up again. Had a hose coming out of the fuel pump / fuel filter to see if gas would come out. It was dry before, meaning the fuel pump wasn't getting electricity. Turned the ignition to START for a few secs and then checked the hose. Fuel was coming out! That's new & positive. Hard to see in the pic, but that's gas dripping out of the hose.
Hooked the fuel line back up to the fuel filter so that gas would be sent to the engine. Sprayed the throttle body with a shot of starting fluid and gave it a try.
Have some fuel leaks to track down, but today was a significant milestone.