Could it be the orientation of the fuel line? Mine fills up, but I don't have it mounted in a stock fashion:
[img]https://photos.app.goo.gl/e9M2J2JMJjqnIzww1[/img]

Last edited by Norcal Dave; 07/26/2017 7:44 PM.

~ Dave
1950 Chevrolet 3600 3/4-ton with 261 engine & T5 Transmission