I have a '72 Uniflite with later style Chrysler LM318's. I haven't been able to determine if the wiring on these engines is correct. The distributers have the after market Pertronix electronic ignition. Standard canister coil with single ballast resistor. All the wiring diagrams that I come across show an ECU installed in the system. My engines don't have the ECU and I'm wondering if I need one. I'm currently rewiring my engines and replacing components like the cap, rotor and ballast resistor. When I look online to find a replacement ballast resistor the single ones are labeled for points style distributer and the dual ones are for electronic ignition. I have electronic ignition but use the single resistor. I'm at a loss as what style and/or what wiring configuration that I'm supposed to use. Any help would be appreciated. Thanks