After finishing my fuel pump rebuild , now I am looking at my carburetion situation, I am tryin to figure out two things…
1. What is the unit mounted between the carb and manifold?

2. Where does the fitting go to off side off manifold where their is a T for brake setup..

Whatever goes on end of that fitting was missing when I got the truck.

Will try to draw arrow pointing to it in pic before I add it on here
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1952 GMC model 473 dump truck
1951 Chevy 1500 stepside