Holley Sniper EFI and Boyds gas tank

[BIG BLOCK JIMMY]

I have been looking for days trying to find a thread on my setup, but there's always something askew with the equation.
I have a Holley Sniper EFI kit (with an external fuel pump) and a Boyds Welding gas tank (non-EFI).
I'm not asking questions about the EFI part yet. My question is on the gas tank plumbing.

The OEM tank had the following:
Filler neck, three vent lines, supply line, and two return lines.

Boyd's tank:
Filler neck, one vent, one return, one fuel feed/drain.

Jimmy has three...four vent lines.

Question is:
Do I need a vent line running back into the filler neck? Or can I install a rollover vent and be done with it?

I'm still not sure if I need a return line with the EFI setup or not, so I suppose if not I could do a rollover vent and a vented line back to the filler neck.

I have called all companies involved and I can't get any continuity out of any of them. I guess because I'm running an EFI system with a non-EFI tank. Holley did tell me that it didn't matter and I opted for the external pump just in case I had to replace it I wouldn't have to drop the tank.