See All 22 Photos Classic Mustangs were factory fitted with this pink resistor wire, which was engineered for the original Autolite/Motorcraft ignition coil and point-triggered distributor.

When Jim Hairston from Pertronix sent us the Ignitor II drop-in electronic ignition for older, point-triggered Autolite and Motorcraft distributors ... in the ignition coil and adjust the dwell ...