Does anyone run a charcoal vapor canister?

I have to focus to smell the fuel vapors.  It's not very strong.  Wife doesn't notice it.  However, some visitors are sensitive to it.

Yup

I ran a hose direct from the vent in my 72 pre-L out to the atmosphere with no filter.  I never really smelled fuel unless I filled the tank really full.

However, I was running a Holley carb at that time.

I'm switching to EFI, sniper 2, while the engine is getting sleeved so will be curious if I get the smells with the new system.  I'm using an external fuel pump with a return line so will be different for my 2.0 project.

JW

It should be eve less with the EFI

Are you sure it is from the tank vent? I had a similar odor in the garage, then realized it was only when tank was near full, turned out the tank had rubbed through and weakened with a hairline crack where it meets the fender.

It looks like the vent is the source.  I have had a hose on the vent for a couple of days and no more smell at the engine bay window, but definitely a smell at the end of the hose.  I don't have a fuel on the end of the hose yet.  

When the tank was out, I filled it with water and checked for leaks.  However, it's no guarantee that the tank does not have a pin hole or crack somewhere.  It only has about three gallons of gas in it at the moment.

On many cars, a fuel smell is from a crack in the coupling hose from the outside filler to the tank on '73-up models. And for reasons that escape me, the crack is nearly always on the hose's bottom where its harder to see. Some of that hose cracking comes from people using radiator hose instead of fuel proof hose in that position while others are from simple age Might be worth a close look.

Thanks Jack.  This car came with a cracked coupling hose, as you described.  I replaced it with a coupling for fuel tanks from Summit Racing.