69 Dart Hard to Start When Hot, Starts Fine Cold. Vapor Lock?

With my 273, you can actually see the fuel bubbling in the filter. Tried insulating the line from the pump to the filter, and from the filter to the carb with no success.
I'd try non-alcohol fuel, but it's not available around here.
Thinking about the tri-nozzle filter and a return line to the tank....getting to old to keep fighting with this crap.