The 69 Camaro Classic Update wiring kit has a orange fan wire. Is this a 12 volt constant or ignition switch wire?

The orange electric fan wire in question is a 12v keyed ignition source. Please refer to instruction sheet 500668 / Engine / sheet #3 / front light wiring / electric fan.

There has been discussion over this circuit being keyed or constant power (fans running after vehicle off).
Following the lead of GM’s decision in the early 80′s, American Autowire chose to run this as a keyed circuit, for safety reasons.