Venting for Fuel Injection Swap

I have the original 70 style tank in mine which has the vent in the top of the filler tube and an Aeromotive Phantom 340 kit in the tank and it works perfect. I would duplicate this.

On my friend's 71 Demon, we basically just put the filler neck in from the inside like on a '70, welded an AN weld fitting in -3 or -4, can't remember, and then duplicated the OE 70 setup.