Rally dash redo

Thanks guys, it is a 67 fastback. Car is in storage(hour away). Non heated.
I had some elec issues going back to 2018. I wrestled most of the summer on it, with little success. Said f**k it and it's still sitting. Seeing as how I had a couple spare harness and a spare 67 dash frame, I thought I would be "proactive" and redo the spare dash at home and swap it in the spring.
May just sell or trade both cudas as a pkg if you know anyone?
@4spdragtop
Maybe the way to do this without driving yourself crazy is work from the harness that needs repair.
Is it a '67 fastback?
Lay that one out on a bench or even better a board.
Tag the bad terminals or whatever needs repairs or replacing.
Then go over to your '68 harness and diagram. See if that one wire or circuit is the same. If it is transfer it. (Unrwap the harness tape, etc)
Do all that you'ld like to replace.
Then any bad ones that aren't one to one swaps will need to be repaired or spliced.

Steve, did you not replace a harness on the 67 with a 69 at some point. Seem to remember you had some issues and did not have the correct piece! Or Am I thinking the opposite with the 69 vert.