I Hope! I may have an answer to the question about ballast resistors and Mopar Electronic Ignition upgrades with different coils. I found the following number for Mopar Performance Tech Support. I tried calling but I was too late however I got a message that it was the tech line: 888-528-4364 The message said they are open M-F from 9:00am to 6:00pm Eastern time. I plan to call them on Monday. I hope they can tell me when and what size of ballast resistor is needed based on the resistance of coils and what coils they recommend for their systems. This should not be that complicated but it seems to be. Maybe if se can get to the bottom of this we can get it posted to help others. Dennis C. 1996 Dodge Ram 3500 Van Conversion 1964 Plymouth Belvedere 318 Auto 1963 Plymouth Sport Fury 383 4-speed 1949 Dodge Pickup 289/C4 soon to be changed 1998 Honda Valkyrie Standard ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.