All of the plug wires now are resistor wire. Actually they are required by law because of radio interference. I could notice the difference when the resistance wire came out almost 50 years ago. I still make my own spark plug wires out of Delco Packard 440 which is stranded wire. I also prefer non resistor plugs. These engines were designed before resistance wire and plugs came out. It is my opinion that they run better on what they were designed for. Non resistor AC 45 plugs appear quite regularly.
