The OP wants to make his car run 180 or less at idle. It's certainly possible to do that with the right combination of parts and tune. Why is everybody trying to convince him to let his engine run hotter? So what if you can. He doesn't want to.
I think everyone is trying to convince him it's OK to run a bit hotter. He's convinced everyone is wrong. He's also convinced that all the suggestions made so far are wrong. I'm convinced there's no solution to his perceived problem. He's attempting to fix a problem that doesn't exist.
