[Tom Wells]

SB,

Not sure how to delicately phrase this, but return lines for a carb fuel system don't do squat.

The only return line that might help would take the fuel directly from the float bowl - not sure how this could be done but I'm willing to listen.

How do I know? Been there, done that. More than once.

Return lines keep the fuel that's in the gas line circulating so it doesn't get warmer by returning it to the tank, typically from a regulator, not from the float bowl.

It's the overheated gasoline (haha) in the toasty warm float bowl that causes the problems. An insulator/heat deflector may help some, but if the car sits, not running, well, good luck with that. Running the fans may help some, but how long does it take to cool the underhood area after the car is stopped?

Tough problem. No easy, simple solution.

Sorry,

Tom