sorry, if you have ac then you will most likely have separate fan curcuits and relays. if you have two fan relays in the under hood fuse box then you have the option. the production code is c60. my current 93 both come on and the old one i dont know. anyways look over the links i gave.

 

I'd still recommend doing a full flush and fill. Just be careful and stuff rags near the opti, cause it can get messy and you don't want your (knock on wood) opti to go out because of it. If your just sitting and idling and it's getting that high, you're fine. If you were doing highway cruising, I'd be scared.

 

I have a 86 iroc 305 carbed it had a constant over heating problem. So I put a big block flex fan now it runs at 100 I have a 195 therm and it sits at 160 on a hot day. The fan is a beast. Is this bad?