These are the color coordinated Ferraris from my Sears set. Interestingly, the controllers are color matched--yellow with a red trigger, and red with a yellow trigger. Check out the colored heads on the drivers!
Also note that some of these early cars did not have holes for headlights but were just filled in.
How about buying a new slot car with a hand painted head? You could! Here is a close up of the guy in the Ferrari. text and edit me.