Could it be a overheating coil..?

yes my car has the stock size fuel lines and it also has a large phenolic spacer under the carburetor to insulate it from heat. There is definitely no fuel percolating in the bowls since I never have a problem starting the car even on very hot days.

The fuel line to the pump is a metal line of which I have insulated the section directly beside the exhaust manifolds (has rubber fuel line around the metal line). The metal line from the pump up to the top of the engine block has the same rubber fuel line wrapped around it. After that it is just rubber line to the carb. The fuel pressure gauge is tied into the rubber line just before the carb.