does a 160* thermostat require a special tune or is it plug and play?
no but should have fan settings changed a little in tune
Ditto. The stock t-stat is likely 192 degrees, with your fan set to go on appropriately.
A 180 degree t-stat may work well for you too, not being too hot nor too cold...
Thats odd. Mine has been running at around 197. Is that normal for a 180* stat?