Dual Field Alternator Conversion - New Electrical Gremlins!

I converted my '64 to a dual field alternator. So, needless to say, I got a dual field alternator and a new reproduction harness specifically for the dual field upgrade including ballast etc.

Now that I've done this, I have an electrical "crackling" noise coming from inside the distributor. Ordinarily I would just think there was a short in the distributor, but... this happens with the key in the OFF position! Why is there voltage to the distributor with the key off??? I replaced the ignition switch thinking it was staying on somehow. No cure.

I'm baffled as to how voltage is getting to the coil and distributor. Anyone have an idea? Thank you.