Sniper wiring

Generic instructions. On Mopars there isn't a wire that's hot in start and run. Look at your '67 wiring diagram. What you do is connect the IGN1 and IGN2 wires together, and connect that to your pink wire.
Sometimes you may need to use the IGN1/IGN2 circuits to trigger a relay that feeds the Sniper, similar to what abodyjoe suggested; because occasionally there are issues with power interruptions as the key transitions from "start" to "run". If needed, you can mount the relay right where the ballast resistor used to be.
You can't connect to the coil because it causes interference issues with the signal.