Boyds tank with areomotive340 no return on my 5.3

[70CHEVYBB]

I have a new boyds tank with areomotive 340 fuel pump but my 05 5.3 has no return on the fuel rail . Where can I add a return port or what's my best option for this problem?

[LS short box]

You need an aftermarket regulator or C5 FFR to return back to the tank. I'd weld a NPT bung into the tank with a fitting for a -6 SS return line.
I'd put it near the tank. So single line to the front.