Hmm - looks like a stock replacement. I didn't build this car, so not positive, but there's a box branded "select" with what looks like a condenser next to it. That must be the ignition box. IS there a way to test the ignition box?
That's probably the voltage regulator for the alternator.
To perform code scan, here's what you need to do...
Find the test plug.
Hook up a 12v light from the Self Test Output, to ground.
Hook up a wire from the Self Test Input, to ground.
KOEO self tests, put the key in run, but don't start it, the light you hooked up should start flashing codes (noticed problems first), then will display stored fault codes.
If you can get it started,
Watch the light. Normally, the light would flash 4 times to let you know that the computer is I.D.ing an 8 cylinder engine. Step on the brake pedal and turn the wheel 180 degrees (if you have power steering). It will then go through the self test.
This page will show you what the test plugs look like. And how to hook up the light. This site also has the 2 digit trouble codes that your computer should give you.
Ford Fuel Injection ┬╗ How To Run a Self-Test