No power while cranking

I had a similar issue in my dart sport 360. Same symptoms. Another member had advised to pay attention to the female connectors of the ecu plug. Over the years they lose their tension and do not make a tight connection with ignition box. So the solution was to use some needle nose pliers and squeeze the each female connector till it closes the gap running down the side. This actually alleviated my issue of no fire! Maybe try this on your car.