Right Carb for my 340

has anyone ever locked the distributor up? The reason I say this is because I am going through lots of unburt fuel and I blamed the cam and the carb, but what if the distributor was locked out. Put at one setting and left alone. I am told the car will preforme better off the line, will burn the fuel instead of dump it out the exhaust. Anyone ever try this, im sure its a practiced modification.