Time Delay

I assumed ACC is the accessory feed, a delay after key on, reduces transients and is commonly used on modern cars. I am no expert on 71 mopars, I have not tinkered with one of those, so I could be totally wrong.

I read your post again and seems like the power is fed from battery not alternator, so that is a good thing. I need to refrain from posting on my phone, it is very hard to read a post, and reply, my memory is failing me short term.