1973 K20 Holley Dual Tank Fuel Pumps for EFI HD 1080p

Installing In Tank fuel pumps for my Square Body Chevy truck to work with the Holley Sniper EFI system. We are using the Holley Dual Tank Fuel Pump Kit.
What started out as a straight forward project made the all too familiar turn of "what could go wrong on a quick weekend project!"

[@travissummers3258]

I guess I could’ve finished watching your video. Thank you.

[@BarryVandenberg-ig6hz]

I have an 86 k10. That I am doing the same thing to. I was wondering if the factory selector value is rated for efi pressure? Also I was hoping you could describe or provide a wiring schematic for wiring the two pumps to the sniper efi built in fuel relay

[@travissummers3258]

What is the other fuel selector part number? I have the exact same one you’re having problems with and I’m supposed to install it in the next few days