Normal engine water temp

[troonman60]

Newbie here, I have a 70 chevy 4x4 with a 454 and while sitting in traffic today where it was 105 degrees (phoenix arizona) my after market temp gauge went to 235 degrees, then would cool down after I started moving again usually into the 210-220 temp range. Is getting the temp to 235 degrees too high? What are normal operating temps for big blocks? This temp seemed very high to me, so any ideas to bring the temp down would be appreciated. It has a 2 core radiator, new water pump with 195 thermostat. Thanks in advance.