If the fuel pump was just rebuilt, CHECK THE PRESSURE!!!!!!!!!
The fuel pump pressure is controlled by the tension of the spring. There is at least one company selling fuel pump kits with the philosophy that "if the parts fit, they are the correct parts".
Just like carburetor parts, the "one size fits all, works well on nothing, but is cheaper than dirt" can give an enthusiast headaches.
And Jerry, please don't categorize all Rochester carbs with the type B (does B stand for bad

). With the exception of the very earliest 2-barrel Rochesters (AA - Oldsmobile, and BB - 1951 Cadillac), the 2-barrel and 4-barrel Rochester carbs are excellent.
Jon.