FiTech EFI system

I have this setup in the mail and should have it in a week or so. I have a custom made tank so it won't work for most people. I will have the external fuel pump. When I built my tank I added bungs.

I plan to use the one bung to suck fuel from. I do have a second one right beside. I also have the stock vent line up in the filler neck.

The question being. Can I run the vent line to the stock pickup and have the fuel return into the tank that way? Would bubbles cause issues in the fuel?