Fuel Line Diagram Dual Tanks

[Spline64]

Hello,

Looking for a fuel line diagram for a 73 GMC C2500 pickup with a 7.4 ltr. and dual tanks.
Currently the entire system has been bypassed. Previous owner installed a 350 and was only using one tank with an electronic fuel pump direct feed to the carb.

I have since put a 454 back in and am in the process of trying to make things stock-ish with the dual tanks and a mechanical fuel pump.

I did find some electrical diagrams on this forum (thanks guys!!) but can't seem to find how to connect the fuel pump lines from both tanks to the mechanical pump.

Thanks in advance,
Pat