1968 Barracuda 318 Smoking....good compression

rebuilt carb this week. rather dirty inside. clean now. the car is blowing black carbon out the exhaust.....and is running rich. no more blue. I dont know what to do now. idle's nice, just smokes like a mack truck. The plugs were black and chalky, a box sitting behind the exhaust is blackened, covered with carbon.......what next??