Fuel Starvation / Mechanical Fuel Pump

This same problem has been persistent. However, the car isn't driven much. I had the same issue last Spring/Summer and not so much this past Winter.

As many of you suggested, vapor lock has been my guess too. I just thought the cool tube over the fuel line would fix the problem. It hasn't.

One more thing, the car runs rich. I swapped the plugs out today and there was gas on 4 of the 8 plugs. Not sure if that might be a contributing factor too.