Weird pipe in the trunk

Just going over old topics, my 71' Duster being a canadian car had all the evap system but ws removed long before I got it.

This leaves me with the issue of venting. I ended up drilling a small hole behind the handle on my fuel cap but this isn't the answer.

I had thoughts on finding a filler neck with a vent tube on it and just running it under the car with a duck bill style breather/drain to keep stuff out or are there better ways?