My '60 Plym has a 331 with the elec ignition/LA dizzy. Have been driving it for a few yrs. The other day it wouldn't start. Timing light showed no ignition. Took the ignition module to the store, they tested it & said it was bad. Installed new one & still wouldn't start. Timing light showed a flash when key was turned on to "start" & again when released. Low battery, so I charged it up & it cranked right up. 2 days later I'm back to square one. Guy @ the parts house today didn't know how to test the module so he just replaced the one, but I don't know for sure if the module was bad , it may start, but for how long? The ballast resistor checked good the other day. Could there be something else causing the problem/killing the module?