Fuel System layout/ diagrams

[Bob_n_Cincy]

You don't want to cap the tank vent, just the evap line on the motor; the tank needs to vent or pressure will build up (and also let air in to displace the fuel used). I'm in the same situation with an attached garage and plan on adding a small charcoal canister like others have done. The charcoal absorbs the gas vapors (activated carbon has lots of surface area, which is why it makes a good filter). In a full evap system, the canister is periodically purged by a solenoid. With an un-purged canister, the charcoal may eventually saturate. I don't know how long this will take, but I wouldn't mind changing out the carbon every year or so (hopefully less) to avoid the complexity of the OEM evap system and keep fumes out of the garage.

Cap the evap line at the motor like wleehendrick said. Or you can remove all the purge valve and hoses from the motor. There is a thread about simplifying the motor.

I used SS braided rubber hoses for my fuel and return line. The hoses seemed to smell for the first couple of weeks, but nothing anymore.

In your second and third picture, it looks like your vent line is going to the motor.

Also, don't put you vent line anywhere near you exhaust manifold.
Bob