Tie the ballast wires (from the key) together (ballast now eliminated). Wire them to pin 86 on a relay. Pin 85 is grounded. Now the ignition turns the relay on and off.
Pick up 12v from solenoid stud. Wire that to pin 30. The wire left from the ballast which feeds the ignition goes to pin 87.
This setup gives you good solid power to the ignition system.