Ignition help - no spark

Slant6power said

I tried the jump wire, but still no spark. In fact I've tried every suggestion I have read to no avail. With ignition on, I have 4.5 volts at the positive side of coil and 1.2 on the negative (shouldn't be any there right?) I have sanded to bare metal behind the ignition box.

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When you made these measurement, was the ignition in RUN? 4.5v is too low; shoudl be closer to 8-9 volts. Do this again, and check the voltage on the blue wire into the ballast resistor under the same conditions and let us know waht you measure at all 3 points.

Also, please confirm that this car has a dual ballast resistor with 4 terminals. There is a high resistance side to that part and a low resistance side.

Refer to a similar thread at this time in this forum.
http://www.forabodiesonly.com/mopar/showthread.php?t=304276
It turned out that the connections to the dual ballast resistors in that fellow's car were reversed. That put the high resistance side of the dual ballast in series with the coil and killed spark.