Overheating Issues - SB Duster

I had the same prob w/my 360 Dart until recently. The 4 things I did: recored radiator (3x), installed Viscous clutch fan, installed shroud, and new water pump. Was running at 195 and heating to 210 when in traffic. Originally gutted thermostat which helped some but then decided to make prescribed changes.
Have 160 thermostat in there now and will be switching back to 180 as car runs at 160 now and no higher than 170 in heavy traffic! Amazing... now I need it to run a little hotter.