Sounds like the float level is set too low or too high. A high float level will slop gas out the top into the throttle bores and try to drown the engine in fuel on a hard turn. A low float level will slop all the fuel to one side away from the jets and starve the engine for fuel. Modern moonshine blend fuels tend to eat up the lead seams on brass floats, eventually this causes the float to get fuel inside and the float will not close tightly. If you are getting black smoke on a hard turn, this is likely what is wrong. Check the fuel filter, if it mostly clogged, the engine might be starving for fuel because of that. If you hit full throttle in a straight line, the engine will run well for a couple of seconds until it sucks the carb dry. That is a sure indicator of a fuel supply issue.
Dave