Petronix questions

If you are not having a misfiring problem and are installing the Pertronix kit solely to replace the ignition points then you do not need to replace the coil. Any ignition coil will only output high enough voltage to ionize the fuel/air mixture in the spark plug gap and allow current to flow. The difference in the high-dollar coils in pretty colors is total energy output, which is essentially the sum of firing voltage plus burn time.