Engine wants to die at stop lights

Sounds like it's carburetor and or fuel related. Does it run well before it heats up good? Could be overheating the fuel in the lines and carburetor. What carburetor are we talking about? One thing you can try. Clamp on several wooden clothes pins on the metal fuel line. Many as you can get. Drive it and see it the problem goes away. If it does, then the clothes pins are removing excess heat from the fuel lines and they need to be relocated or insulated somehow. If that does not make a difference, then it is probably in the carburetor itself. It might just need adjustments.