Common spot with an easy fix. If the carb came with an O ring in the carb socket, make sure the intake is pressed up against it when tightening it down.
If it didn't come with an O ring, go to the parts store and get a viton rubber O ring that fits inside the carb that is close to the same thickness as the intake tube.
There’s no casting faults or anything that I can tell I’m just really confused as to what’s wrong because it’s all normal it’s just giving me a issue for no reasonOnly use one, and inspect the intake manifold for a casting ridge. File it off if there is one. You should have less than an 1/8" left between the carb and the shoulder on the manifold.