Filter with Return: Cure for Vaporlock?

Ethanol boils at 173°. Cooler fuel with a return system helps but non ethanol fuel is the best choice. Remember, Most of the fuel evaporation happens in the float bowl. Worse with Weber/Edelbrock carbs and worse with a thin base gasket. Add some exhaust flowing through the heat riser passage on a stock cast manifold and you just add to the problem.