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Cooling problem

i have a 327,two year old radiator,one year old water pump,it runs HOT. i think its a flow problem, as long as iam driving it runs 190 degrees as soon as i get in stop ang go traffic up the temp goes and she starts to run bad as the gas in my fuel filter shows it bubbling and the line is in stock position. is it radiator or water pump?

Could be neither, A pressure test and compression test may lead you to the proper fix.

what would this tell.