Switched 12V circuit in engine bay that is hot during "key on" and "cranking"?

[WHITE AND RED 69]

I am adding efi to my 69 charger and I was wondering what wires in the engine bay are a switched 12V circuit that is hot during both "Key On" and "Cranking."?

My setup is stock a 69 wiring harness with MSD6AL box and I wired in a 70 style voltage regulator. The ballast resistor has been bypassed. Can I tap into the original ballast wires and if so which wire? Or is there a better spot?

[John_Kunkel]

If you're dumping the ballast, merely hook the wires on both sides of the ballast together and use them to power the MSD small red wire and the EFI.

[WHITE AND RED 69]

Thanks John   

MSD box has been hooked up for years now and the ballast wires were hooked together at that time.

So the MSD instructions had me hook up the red power wire to the original + coil wire, so I can just tap into that connection for the EFI? That would make it easy or should I tap into one of the ballast wires? Would it matter which ballast wire I tap into since they are now connected?

[John_Kunkel]

Once the ballast is eliminated, the coil + wire is the same circuit as the original ballast wires so, yeah, that's as good a source as any.

[WHITE AND RED 69]

Sounds good. Thanks again John!