I pulled the harness from my 1982 El Camino which originally had a 231 v6. It had that removed along with the emissions crap and a carbed 350 installed when I bought it. I'm going through the harness now in prep for my LS swap and I have a few connectors I don't think are needed but haven't been able to ID them yet. I think perhaps the largest white one is maybe the computer connection? It also had AC and cruise. Model was a Conquista.