After a fire.....

to the OP: so my understanding is that your insurance company is doing the right thing. If that's the case, why are you working around a 55 year old wiring harness, or contemplating buying a used 55 year old harness to put back in. M&H make exact direct replacement dash harnesses for 64 and 65 Darts an Valiants. They are sold through Year One. yeah they cost a bunch ($450?). Ask the insurance company to replace the burned up harness and then make an investment and buy the underhood harness to go with it. Then you have new wiring throughout, no compromised connectors, wire insulation that is new and pliable, new bulkhead connectors that can be packed with di-electric grease while new. IMHO this is a good investment and a cheap insurance policy compared to patching stuff together until the next piece of 55 year old wiring burns the car up for good. The original wiring lasted 55 years, if this new wiring lasts half that long it was worth doing.