overheating is the first sign that there can be a problem in the cooling system of the car that will in turn ignored will damage the engine and the car eventually so whatever it is get it diagnosed.
The difference between carburetors (non injector) and fuel injection is that fuel injection atomizes the fuel by forcibly pumping it through a small nozzle under high pressure,
carburetor relies on suction created by intake air rushing through a venturi to draw the fuel into the airstream