They do make reproduction wiring harnesses with same wire color codes and connectors, matter of unplugging the old and plug in the new. I was not able to find a company that reproduced the dash harness at the time and ended up with a 'do it myselfer' repair using plastic ties to keep each trunk separate while making the repairs. They do make harness wrap which is none adhesive, just wrap the wires and I use blk electrical tape to secure the ends. This kit thru Carolina Classics looks like the answer for a complete wiring replacement, to include upgraded features, too bad they were not available few years back. Bookmarked the referral, thanks for posting. The reproduction harness will run approx. $100 ea. for the head and tail light harness, and approx. $50 ea. for the alternator and engine harness I will have to check and see if the company that makes the individual harness replacements is the same company that makes the kit, is so, I was very pleased w/ the quality, and workmanship of the individual reproduction harness.
'problem with engaging in useless activity is never knowing when your done'
65F100, 302ci, T18, swb, flareside,front disc. PS, Duraspark Ign.(Daily Driver)
65F100 CC, 390ci, 3sp.OD, lwb, styleside, front disc., Duraspark Ign.
64 GTO Project (in boxes)