Photos of my 65 Dart first (yellow) and 64 Valiant (red). I fixed all the prior owner hacks and sheathed the wires. In both cars, the main harness routes high, looping above the instrument cluster. The 64 harness is much different since dash components are in different places, plus the dash shift buttons make the dash different from the floor shift Dart's.
The Dart had many more "fixed 'er" repairs, like butt-crimps w/ whatever color wire was at hand. The add-on ammeter is gone. Not sure why I painted the under-dash with the harness and wipers in, since I later took them out and finished painting (polyurethane w/ foam brush). Working smarter on the Valiant.
I include the wiper switch wiring of both, since complicated. Some terminals are simply a convenient 12 V junction, nothing to do with the wiper itself. Also varies between 2 spd and variable wipers.
I had the Dart's plastic "re-chromed" at Sacramento Chrome ($110 for all plastic pieces). It is a spray technique which the guy claimed is more rugged than actual chrome. The first method he used wasn't satisfactory, so using a better method. I stripped them first using Walmart's SuperClean. I left it all chrome since looks better and trying to black the "weave" would take more time than I have. Cleaned the cluster circuit board, added electronic Vreg, LED bulbs.
Your 65 has the nice "buss bars" to feed-thru the thick ALT and BATT wires in the bulkhead, which keeps from melting the connectors. Don't lose that with your Year One harness. Indeed, I changed to that in my 1964 (
http://www.forabodiesonly.com/mopar/showthread.php?t=228908).
The last 2 photos are re-working my 64 dash harness. You need a lot of table space for all the materials. Nice winter project while you watch TV. Buying a new harness sounds smart if you don't have to customize it much. I upgraded the factory design, adding a relay for ACC, jumpered IGN1 & IGN2 since I have no ballast and those simply trigger an IGN relay under the hood (relay box from 90's Jeep).