You are using an Accel Super coil. They need a 2nd ballast that comes in the kit. I have one on my 340 for over 40 years and never had a problem. Get ahold of them for a replacement, if you don't have one.
Thats interesting, just lookes up that coil and like you say they have a 2nd resistor in series with the OE resistor. I have not seen it when I was looking before, but then again i wasnt expecting to see one. I need to take a look and see. Thanks.