| I also believe a 12 volt coil will eliminate the need for a ballast resistor. Our older Dodge systems are made to start with 12 volts to ensure it will start. After starting when the key returns to the run position it feeds power through the ballast resistor dropping the voltage to the coil to 6 volts. If you bypass the ballast resistor it will run but the constant 12 volts to the coil will cause it to eventually overheat and fail. If you take the ballast resistor out or bypass it you need to replace the coil with one made to operate with a constant 12 volts. Pertronix makes a 12 volt coil some of the other manufactures also have 12 volt coils in there cars they are not hard to find and not to expensive. 
 Sent from John
 --I can't testifie about the Mopar  electronic, but for  points or Pertronix, you can eliminate the ballast resister by going to your parts house and asking for a coil that says right on it, "no external resister needed" It should be on their shelf.  They must have the resister built right into the coil. .....................................MOOn Tuesday, June 11, 2013 9:08:24 AM UTC-5, Roger Pettigrew wrote: 
the only way to eliminate the ballast resistor is to go with a complete 
aftermarket ecu system, such as MSD or pertronics, as well as a different 
coil   
  I know it has been covered here before, but with 
  advancing CRS (can't remember s***) on my part, can someone tell me how to eliminate the ballast 
  resistor ? I have the MoPar electronic ignition with the orange box, and want to eliminate the 
  weak link in the system if possible. Thanks, Warren.  -- --
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