1 wire is the easiest to convert. I did mine about 2 years ago. Piece of cake. There are a lot of post here about the swap. You have to make sure you account for the voltage change. Horn and starter will be okay. All of your lights will need to be upgraded. (headlights, tail lights, dash lights) Gas gauge will need to be changed or a voltage reducer put in line. Some people have said their heater motor runs find with the switch and some have reported them burning up. Mine did not survive the conversion. It took some searching but I found an electric motor for about $35 at Autozone that was a straight swap. There is also several post hear about that swap including the part number for the motor.
