Just wanted to share this fix with anyone who may be interested. I filled up my 57 Chevy for the first time Saturday morning and noticed gasoline dripping at an alarming rate from under the car. Checking the problem out I saw it was coming from the area where the filler pipe connects to the gas tank. I pulled it around the corner of the gas station and crawled under there for a better look. The rubber seal that was there was just hanging partially loose, broken. I called around to parts stores but no luck. I didn't relish the thought of draining some of the gasoline from the gas tank since I was away from home, in dress clothes, and it could be a bit messy. Then I happened to think, Vacuum cleaner belts were very similar to the rubber seal I had in my hand. I went by a vacuum cleaner repair shop and the guy matched the rubber seal in my hand to a hard rubber vacuum belt he had on the wall and they were almost identicle. He didn't even charge me for the belt. Ten minutes later I had the problem repaired and it has worked fine. Just thought I'd share.