this is where i yank the ecu plug and ditch the ecu.
drop in a points dist hooking the dist wire to - side of coil,just remove the stock wire that is there on the - side of coil.
hit the key and ride. when I get the funds up, I jump the BR for a full 12 volts to coil and add an pertronix points conversion with the 40,000 volt flamethrower coil.
done this a bunch of times on mine and others mopars on the side of the road with a points dist. but once converted to pertronix I have never had to work on any ign., problems again.
if I stay with points,i do have to reset them every 3 months or so but thats the way point are.
been running the pertronix set up for the last 17 yrs now and for a tune up it gets a cap/wires/plugs only. never mis-fires and will spin 7000rpm+
good luck changing stock ign. parts out.