Much info on the megasquirt site. Modern ignitions use crankshaft pickups. Some have installed a 36-1 tooth wheel to their crankshaft to trigger a Ford EDIS box. I put one on my 1965 273 engine for the future. Many posts here on using an 8-pin GM HEI module. It controls dwell, so doesn't need a ballast resistor, and can give a stronger spark than Mopar's ECU using an e-core coil. You can just use GM's coil with their cable connecting the two.
