I gotcha. Get the thing on the hwy cruising at steady 55 to 60 for a few miles. If the temp goes down, it would point towards a possible problem with the shroud or fan not being up to snuff at idle.
205-210 is normal for most newer stuff including the magnums run at. Wondering if you accidently have a 195 thermostat installed. I don't like my engines running that hot so I always put a 180 degree thermostat in my magnum engines. Even that didn't cool down my 5.9 in my van enough for my liking so I wound up installing a big capacity aluminum radiator and electric fan set up from a Dodge Intrepid. Big difference now it will cruise at 185 all day.
Good luck with the other stuff I have been in similar situations.