Help on fixing a vapor lock!!!

Wooden clothes pin serves as a heat sink, wicks heat away from the fuel in. I've seen 3 on one line. Some laugh at it, it does look goofy. Some say its a old wives tale, whatever, until they hear it does work.
I had the same fuel vapor problem ( stumble when hot ) with my 67 273. Thicker carb base gasket and rerouting fuel line which included re positioning the fuel filter, cured it. No clothes pins req'd.