Big Block Dart Cooling

Took the Dart out this afternoon. Drove about 40 minutes on the freeway to the Pavillions in Scottsdale, AZ. Temp gauge got up to 210 by the time I got there. Guess it's time to address the cooling issues. outside temp when I left was 90 degrees. Been windy the last two days and today I had a slight headwind. Drove the car no faster than 60 MPH.

1968 Dart GTS
383/TF
Carter 625 w/the metering rods stepped up two sizes
Electronic ignition
Timing at 36-38 total degrees
Motor is .040 over
Stock two core Rad (2898033)
Stock fixed fan
Stock Fan Shroud
440 Source water pump
3.91s (but will soon update with 3.55s
Stock Big Block A body pullys
Running 50/50 coolant

Open to constructive suggestions