Back in the olden days (50's-60's) I remember seeing a cone shaped spring like thing that you put in the filler neck. It allowed fuel to go in but you could not get a siphon hose in because of the shape. I think I saw it in the JC Whitney catalog.


David Fritzsche
1990 Ex-Cab V-6,5-speed, with a few mods
04.5 CTD Dodge 2500 Ram--Tow Rig
Roseville, CA

"Serenity through Sobriety"