Looking for a little guidence

So my buddy just picked up a 79 st regis and the wiring harness is a complete mess. it has a what looks to be a period correct msd ignition box and some other msd parts as well. We started diving into the factory harness and found good portions of the harness completely melted together. We have either 2 choices, pull the harness out to condense it down and hopefully salvage the good wiring and maybe mend some of the melted wiring if necessary or try to hunt down a factory original that's in...

Looking for a little guidence
Author: Jnfbodyguy83