Make sure you charging system is working well and use an electronic voltage regulator. Electronic ignition does not like low voltage and may result in module failure with 4-pin HEI modules. The 7 and 8-pin HEI modules are more tolerant of low voltage. Resistor plugs and wires are also a good...
Hi Richard,
Unless you are having trouble firing oil fouled plugs I think a Magnetic discharge (Kettering Ignition) will deliver more enegy to fire the plugs. The energy storage capacity of a CDI setup is limited by the charge time of the capacitor. In most cases a 1 - 2uF capacitor is the max...