Nice knobs you made! Have you checked out tanks inc for a fuel pump? Most drop in fuel pumps I've found for retrofit do not have the sending unit built in like a newer efi vehicle. When I had the Fitech for my 40, I used a stock replacement pick up tube and took my fuel sending unit and added the pick up tube to it. I then added a walbro 250 to the bottom and used a holley hydramat at the inlet of the pump. It was a fiasco to put it all through the small sender hole. I think that's part of why most have them seperate.
https://www.tanksinc.com/index.cfm/p...=cat/cat61.htm