engine forward working harness alternator.

I stripped the engine harnesses from a slant years ago, might have been a 1974. I used the lamp harness in re-wiring my 65 Dart. I may have the section you need. Post a photo of what you need to connect to. As I recall, it had a large rectangular "56 terminal" connector for the wires going to the alternator and distributor.

I do have a 1964 slant, but don't need that 70's harness since I did all custom wiring. If your only goal is the alternator wiring, you could do that from scratch. Install the Vreg on the inner fender beside the alternator. Feed it IGN power. I used a relay so power is straight from the battery, not via the key switch and thru the bulkhead (causes many problems).