Working on a 54 Chevy 235 with a 1960 235 engine

On my fuel pump there are two vacuum outlets, one for the wipers and one that goes to the intake manifold port below the carburetor.

Question: is the line that goes from the Fuel Pump to the intake manifold port below the carburetor vital to the engine operating ? Can the line be plugged off at the manifold ? I have an electric wiper.

I am finding it a challenge finding a replacement Fuel Pump with the two vacuum outlets. See image below. I can get a single stage Fuel Pump that has no vacuum outlets.

[img]https://www.chevsofthe40s.com/images_product/large/5592675m.jpg[/img]

I have also posted in the Truck Parts Wanted

1954 Chevy 3104 3 Window Hydra-Matic in my family for over 60 Years

Once in a while you get shown the light in the strangest of places if you look at it right... "Scarlet Begonias" Grateful Dead 1974