Help Installing fuel filler tube grommet and vent tube on a 69 Cuda fastback

[1969FB & 1967NB Cuda]

I bought this 69 Cuda Fast back last year and am working out the bugs to make it drivable. I got all the electrical working now my next issue is the fuel filler tank grommet and vent tube. My 67 Cuda is a coupe so it was easy to remove the filler tube and Tank. This is a 69 fastback and it needs the fuel tank filler tube grommet replaced. The old one is just slid on the tube, it is not fitted on the tank. When I tried to fill it up, the gas came out the tank at the filler tube. The grommet is not fitted in the tank! just sitting outside the tank on the filler tube. The other problem is the Vent tube came with the box of left over parts LOL. So my problem is how to replace the fuel Tank grommet and install the Vent tube on a 1969 Cuda Fast Back? I though of dropping the tank and walking it out but I need to install the missing vent tube. What Interior parts do I need to remove to replace the filler tube grommet and install the missing the Vent tube? Any easy way to do this or does the back seat have to come out? Help

 

[Murray]

Drop the tank to replace the filler tube seal which installs into the tank. The vent tube snakes around at the top and then finds its way down the tube and exits under the trunk through the fill tube trunk gasket.

 

[mvh]

Just to clarify, the tank seal is a donut that has to be fitted into the tank opening before you insert the filler tube. The filler tube needs to be more or less in place in the car, and you have to wiggle the tank up on it while you wiggle the filler into it — if either one is bolted in place you don't have enough "wiggle" (at least, that's my experience). And obviously, the filler tube goes through the flat seal in the trunk floor (which is different than the one in the coupe). But anyway, you have to drop the tank out completely to start. It's insane that the previous owner didn't have the tank grommet installed correctly.

 

[1969FB & 1967NB Cuda]

Just to clarify, the tank seal is a donut that has to be fitted into the tank opening before you insert the filler tube. The filler tube needs to be more or less in place in the car, and you have to wiggle the tank up on it while you wiggle the filler into it — if either one is bolted in place you don't have enough "wiggle" (at least, that's my experience). And obviously, the filler tube goes through the flat seal in the trunk floor (which is different than the one in the coupe). But anyway, you have to drop the tank out completely to start. It's insane that the previous owner didn't have the tank grommet installed correctly.[/Q
Your exactly right the grommet is not fitted and is probably the original. I cant figure how they would install the filler tube and not install so the lips fit in the tank. Thank you