As you describe it, no.
But you are using terms that I would not use and what you mean might be correct.
I don't know what a "sending line" is and if you "eliminate the pressure line completely" your car won't run.
Here is my best explanation, hope it helps.
The 3 port pump has a pressure relief valve that limits the pressure pumped to the engine, the 2 port pump does not have this.
So the 3 port pump has a suction port which is connected to the supply line from the fuel tank.
It has a pressure port which is connected to the pressure line going to the engine (injectors and fuel pressure regulator).
And it has a return port which is the outlet from the pressure relief valve in the pump. The port is connected to a "T" fitting in the return line that runs from the fuel pressure regulator in the engine compartment back to the fuel tank.
When you install a 2 port pump in place of a 3 port pump you connect the fuel supply line from the fuel tank to the suction port on the 2 port pump. You connect the pressure line to the engine (injectors and fuel pressure regulator).
This leaves you with the now unused line from the pressure relief valve in the 3 port pump that is "T"d into the return line that runs from the fuel pressure regulator in the engine compartment back to the fuel tank. You remove this "T" fitting and install a straight connector or you replace the 2 lines with a single hose.
Always use the proper high pressure fuel injection fuel hose and the fuel injection hose clamps.
Good luck
Jim
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