Venting...tank or filler neck

[absintheisfun]

It seems I'm asking a bunch of questions on here as of late...got another, and thank you for all the help and advice!

I have a 67 camaro with a ricks tank and a ridetech filler neck. I have modified the filler opening so it is centered on the tail panel, which did raise it up about 1/2-1 inch. I have found and fixed all my fuel leaks, and I'm certain that there are none left to contribute to the fuel vapor smell in my shop, but I still smell a hint of fuel in the air. I think that the hose (2"ID) from the filler neck to the tank may be too big(ill measure that out later,) but the question....

Ricks tank has a 1/4" npt bung on the front of the tank for venting, but I have read that with a full tank, it saturates any vent system you put in (even II much vents). The ridetech filler neck as a n 1/8" npt at the top of the neck for optional venting. Would it be best to use that?

Anyone ever used this filler neck, and if so, how did you vent it?