Just an update - I replaced the voltage reg and at last check, it was reading about 12.9V with car off, and 13.6 ish with it running. I am still getting a slight drop in voltage with revving the engine (like .2v), but maybe this is normal?

I'll keep watching it and keep my battery charger in my trunk just in case...

Also, it was no one's idea but mine to drive with the battery disconnected. Stupid, yes, but a lot of things you only realize were stupid in hindsight.

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