Well for my system it is the easiest thing to do, unbolt the points/condensor take the rotor off, slip the magnet relutor over the shaft bolt the pertronix in, check the air gap between the relutor and the pertronix module it should be .030 and make sure to use the the pertronix coil they tell you to use.I think its 40,000 volts, then hook up the positive wire to pos,negative to neg..leave the ballist reistor right where it is hooked up and then start the car and check the timing..And your DONE.... <img src="http://www.aaca.org/ubbthreads/images/graemlins/grin.gif" alt="" /> I love it makes the car so smooth and like a new car.