Very versatile relay be used for many applications I will also click together if you want a bank of relays

Most AMC, Chrysler, Ford and pre-1974 (Non HEI) GM vehicles are equipped with OE resistance wires. Pertronix’s Ignitor II and III ignition systems require a full +12V power connection between the ignition switch and the positive coil terminal. This requires bypassing the ballast resistor or resistance wire. In many cases, the original resistance wire is buried the vehicle’s wiring harness. Adding a Pertronix power relay will eliminate digging through the wiring harness and replacing wires.

This 30 AMP relay kit can also be used with the original Ignitor conversion kits as well. The benefits in addition to easier installation are as follows:

Minimizes conducted voltage spikes by isolating the ignition power source from other high current equipment
Provides consistent full battery voltage…No more voltage fluctuations from over loaded ignition switches
Eliminates problems from worn-out and corroded ignition switches, connectors and wires
Universal design…Works with most battery ignition systems
Small size…Keep your engine bay looking stock