Another thought about your problem. Check your clutch fan to see if it is good. After you have fully heated this engine up and driven it for some distance, pull over and shut the engine off.
Pop the hood and attempt to spin the fan. There should be some resistance. If not that may be the cause of your heated fuel issue. The viscous clutch mechanism is dead and needs to be replaced. The viscous 'fluid' leaks out of the mechanism but never gets noticed.
Do you know what was good about the good old days? I wasn't good, And I wasn't old!
Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....