The steel fuel line from tank to pump on my '49 was plugged, so I took it off to clean. No amount of solvent was making a dent. I took my torch & heated the plugged area at end of line. The gum/varnish caught fire & started flowing out like those black worm fireworks. It was really cool to watch & cleaned out the line. Don't worry, I did it in driveway & waterhose ready.
