Carburated engine return line

[70CougarXr7]

Not sure where to post this since its not an EFI.



Running a carburated 408( well should be when it arrives in a few weeks)
Stock fuel tank with external electrical fuel pump from holley
Got filters, pressure regulator and a return line in place.

Question is, where do i best install my return line?

My fuel tank has a drain plug so i was thinking to connect my return on the drain plug.
(Just not sure if this might cause an issue?)



What are your thoughts?

Thanks!