We need more information on what exactly you did in order to help you. Did you utilize the late-model filler neck as well? There should be a vent tube that comes up and connects with the filler neck. If you modified the way the late-model tank works then we can't answer it without knowing that.


1946 GMC Pickup - S-10 Frame, 455 Buick, TH400, original patina.

My 46 GMC on Photobucket