Having problems running when car reaches operating temperature. I can see in the clear filter before the carb and it is like it stays full of gas until the car warms up and then the carb starves for fuel. Have ruled out vapor lock and ran all new fuel lines. I have replaced the fuel pump and even varified no blockage at the tank. I put on a friend's new carb and it made no difference so I don't think it is dirt or floats.

Any ideas??? I don't know can it be vacuum or what are the options since it is only when at operating temp? No problems cold.