Overheating In Traffic

[par4tom]

I have a 61 chevy c10, with the following:

Champion 3 row aluminum radiator
Flex a lite 16" 2500 cfm Syclone electric fan on a 160 degree switch mounted on the inward side of the radiator and in "pulling" mode
Serpentine belt system
Weiand high volume mechanical water pump, brand new.
Thermostat is a 180 degree and works fine

The motor is a small block 383 Stroker doing about 400 hp.

Living here in Central California, the summer days can get really hot and over 100 to 110 degrees. Driving down the road, the gauge reads about 160 degrees. Not bad.

However, I get in traffic and it quickly starts to escalate to 220-240 degrees. Is there anything I can do (a larger fan maybe) to keep this thing cooler during these Hot August days?