My '55 TBird overheated in traffic.  A couple of traffic lights and my temp gauge would march over to hot.  It never boiled over, but it made me so nervous I quit driving it in town.  It had a stock water pump with an old stock radiator that looked original.   After some research, I removed the old radiator and installed a new Champion aluminum radiator and electric fan.   I also removed the stock belt driven fan.  The whole cost of doing this was around $200.   
Since this swap, I can not make my TBird overheat.  I still have a stock iron water pump on my engine. I am running a 170 degree wide gap thermostat I bought from NPD.  Once it opens, you can remove the radiator cap and see the water rushing though the radiator.  It's a torrent.  I believe most TBird overheating problems are with the radiator, not the water pump.  My solution will never win a Concours d'Elegance, but it works great.
 
          
			    				
			    