67 barracuda under dash wiring and fusable linkharness
You can see the fusible link in the engine harness here:
question on the main harness plug on firewall
Original will have a yellow flag. The one in the post linked above is a Year One/M&H harness I installed 20 years ago.
Here's the original engine harness from my '67. Yes I kept it and use it for parts and reference.
Repop from Bill Evans shown here.
Intermittent total loss of electrical