Help - No electrical power at all (67 Barracuda)

Just a thought. If I am ok living without the ammeter can't I just pull the fusible link out of the engine bay bulkhead connector and splice it into the black line running to the alternator?
Not sure what you're trying to do, but it's best for fusible link to be as close to the battery as possible. Further, its located where it shouldn't catch anything else on fire.
If you replace it with a fuse, its will blow at the slightest over current. Again not sure why you would do that. The battery occassionally is called upon to run the whole car - like when the alternator dies - and with a fusible link it can do that, at least occassionally. It also can occassionally handle the brief high current when recharging after deep discharge. I don't recommend letting it charge at 30 amps for any length of time, but the link gives a little cushion to deal with the situation.

Since the link melted once, I'd say its well worth unwinding that taped mess and seeing what is there. It's not as hard as you think. Where abouts in NJ are you? Something is shorting or high resistance. Are those rat tails loose? Post some pics if you can.
On '67 B, the Y cavity should be a single 18 gage red wire to power the headlights (high beams IIRC). Sorry to say but I think its well worth straightening out the mess.

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'67 barracuda bulkhead wire connection
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Connector with cavities S through Z removed from firewall.
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Inside view with wire terminals removed from cavities S & Z.
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