Looks like the stock fuel pump has three hoses attached to it. I'm figuring one is the fuel inlet from the fuel filter/tank, one is fuel TO the stock Mikuni, and the other is fuel FROM the Mikuni? My plan is to connect the "TO" hose to the Weber, and either bolt/clamp the end of the other one (return?), or remove the hose at the pump and cap it there.

Also, BIG thing I forgot, was the carb wiring harness. The Weber has an electric choke like the Mikuni, so what's the easiest way to do this? Unplug the Mikuni harness and connect a wire from the car harness to the Weber? Or leave the harness plugged in, cut the wires about 6 inches from the Mikuni, figure out which wire is for the Mikuni electric choke, splice into that wire for the Weber choke, and wrap the ends of the other wires?

So is there any harm in just unplugging all those vacuum lines and just leaving them there, and running that new one from the Weber to the distributor, and plugging the water and fuel return hoses with a bolt/clamp? For now, that's my plan. If I need to trace those vacuum lines to where they terminate and cap them or something, I need to know, so I can go out and buy some rubber caps.