Holley pump using stock tank!

I looked into the tanks inc setup. I had already replaced my tank two years ago so I didn't need a new tank. The holley is a drop in unit with an internal regulator. Running a return hose wouldn't be hard but not doing it at all is even easier!

The spectra unit looks good and has a walbro brand pump (so i've heard). But the spectra stock sending units are extremely unreliable and just dont work. I have a spectra stock replacement A body sending unit on the shelf that was pretty bad.