I too used the Flat-O adapter and have had no problems. I used a mini starter on mine so that maybe why I didn't have the starter contact issue like paul2748.
Yes, the wooden cloths pins wouldn't allow the steel lines to heat soak as the pins didn't heat up as fast as the steel lines.
Good call on checking the vented tank cap too!
Years ago MANY cars/engines vapor locked. It was not uncommon to open a hood and see cloths pins on the steel fuel lines. Some hoods trapped engine heat which compounded vapor lock in stop and go traffic. Many engines as late as the 70s would boil the carb dry after running a long trip and...
Want a 53-56 F100 frame cheap around the St. Louis area. Would prefer a roller 110" but would consider a 119" if the price is right. PM me if you have one.