1050 Dominator Too Rich

My big Dominator carb is running too rich on the idle and low speed circuits. Engine blubbers and won't smooth out when holding a steady 2500 RPM. It has the 8896-2 carb. Some say to convert it to a 2 circuit carb, and that improves it. Anyway to fix this other than re-drilling passages and putting in transition slot restrictors?