If you have a Harbor Freight nearby these have worked for me for a stuck filter reaching up from under the truck.
https://www.harborfreight.com/20-in-high-performance-groove-joint-pliers-64460.html
I took mine to a local shop and had the truck wired back to OEM spec. I needed the 3 below parts.
90982-08264
Connector housing is part# 90980-10982
Repair wire is part# 82998-12470
Fusible Link is part# 90982-08264
There seems to be a shortage of the the Fusible Link right now
I am very familiar with this truck, the level of detail of the work performed is incredible. Whoever ends up with this 80 will be very happy. Logicbyondreaso’s knowledge of the 80 series is impressive, he has helped me out on many occasions with problems with my truck.