I cannot find a wiring harness for a 1990 Iroc z Z28. It was my fathers car before he passed away of cancer in 2009. It was left sitting under a carport since I got it sent to me a month ago. Does anyone know what wiring harness I need because rats chewed through the wiring. I just want to get it all running again and cannot find information. Called GM and they said go to junkyards but I have called all the ones around me and they have no IROC Z's. Any help would be appreciated.

Car specs that I know of:
Engine: 5.7 V8 TBI
4 Gears
RWD
COUPE 2 Door