Where is the ignition resistor on a 1978 dodge d100?

On a 1978 Dodge D100, the ignition resistor is typically located on the firewall, near the passenger side. It is a small rectangular component that can be mounted on a bracket. Its purpose is to reduce voltage to the ignition coil to prevent overheating. If you're having trouble locating it, consult the vehicle's service manual for a detailed diagram.