I am not sure yet. I have the Pertronix (IIRC) that Dad had on the engine for now. Not sure what the best avenue will be when it is time to go fast. The original plan was to leave the motor as is, lock timing out to limit cylinder pressure spikes and add C16 or Q16 fuel and 18-20psi boost. Need reliable spark up to 7000rpm, will rev to 6000 though likely