Nitrous plumbing A1A...??..

Have you thought of just adding another steel line into the existing sending unit of your stock location fuel tank? I assume it's stock location fuel tank and sending unit.
I did mine that way because I can't stand how it looks having a separate tank under the hood. Removed sending unit, drilled extra hole, bent a steel line to fit to the bottom, then soldered it in there. I saw the picture of your electric pump installation and it would be perfect for this.