Bought a new carburetor for my 1984 nissan
pickup 720 I get gas to flow to the carburetor but
there is no gas going into the carburetor
Check the fuel filter and the fuel pump. I think your truck has a mechanical fuel pump if I remember correctly. There may be an inlet fuel filter on the carb so check that.
It's got an electric fuel pump took the fuel line off the carb turned it and had fuel flying out. I'm getting fuel to the carb but nothing is going into the carb