Hi Anton,
Your carburetor probably has a lot of issues such as a malfunctioning accelerator pump, probably a warped body, and other issues common to the Rochester B.
Even so, I would properly rebuild the Rochester B with the best kit available before I purchased a knockoff from the slave labor factories in China.
I had two Chinese fuel pumps fail to work straight out of the box (well one lasted a few hundred miles) and am currently dealing with a substandard Chinese Carter knockoff on another vehicle.
Carbking will probably be by soon enough to give you some guidance.