Dies after 2 miles, why?

Turns out it was a short in the 2 prong connector that connects to the distributor. One side read about 0.9 ohms from the connector to the ECU, but the other side read between 5 and 30 ohms, depending on how I wiggled the wire. I cut out the old one, and soldered in a new on, and problem solved!

Incidentally, the 408 idles better than ever (literally), and is smoother at all RPM's. I suppose the connector has been bad for years, it just deteriorated to the point where it finally dies.

Thanks for all of the help!