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.
