Drill a hole into Fuel Filler Neck?

All,

The car is a 73 Dart, that has a charcoal canister and a vent tube that runs to the tank. The canister has been removed. I want to use the 1/4 vent line for my FiTech Fuel Command Center as it requires a vent. The FCC "vent" actually may have some small fuel content in it. I am looking into running the 1/4" line into the filler neck or just get a new fuel sending unit that has a vent built in. So I'm trying to get a feel of all that is involved before I decide the direction that I'm going. The filler neck gaskets and tank grommet look ok but could crap out though. One great thing about FABO is all of the info and work-arounds, so I ask the dumb question and accept the feedback from everyone. ;) I will most likely tear out the tank and the neck and replace with new gaskets and grommets. This way the vent line will go in lower that the fuel filler tube and perform better.

Thanks,
Marion