Thanks for the suggestions everyone, O'Reilly has a 3' length of the DEI 3/4" heat shield and some Cool Tape in stock so I was able to get it all back together today.
Here is what happened to the last harness that was in the place
Thankfully the wires inside it were untouched.
This is the one I was most concerned about, the oil pressure sender circuit.
The rest of the harness that goes forward under the header, now protected by the DEI loom and cool tape.
I was able to form the shielding to aim it away from the header and I'm certain it'll work great now.
I knew it was close before and I watched it all season long, only near the end of the year did it finally melt a hole through the casing. I feel a lot better about how it is now.