I have had good luck with the Pertronix. I have owned two, one was in my '68 Cougar for many years serving as my wife's daily driver. Car and Pertronix now reside in Aus. To install it you would need to retain your resistor as the resistor is there to limit current to the coil. The Pertroniix has two wires, one red and one black. The red goes to 12V, so hook it to the 12V side of the resistor. The black lead goes to the negative terminal of the coil.