The Stovebolt Site Forums The Shop Area Engine Shop Mechanical fuel pump

Hey bolsters-
When I got this 53’ GMC dump truck, it already had an electric fuel pump wired in under hood.

So I assume the mechanical pump failed at some point.

I am doing some other engine repairs right now and figured if I could delete the electric pump it would be nice to have the original setup work.
If feasible.

Here are a couple pictures of it.
It has four threaded ports?
The glass fuel bowl has two ports on either side…
That would be obviously in/out.

But what are the two fittings on other end for?
They actually have vacuum and pressure when manually operating pump lever.