What size motor is on your drill? I used a ¼ horse drill for most of my pin removals, but I recently bought a ½ horse, and it takes out pins with over 180 torque.
The other suggestion is a large ratchet wrench with the tuning tip. Mine is about 12' long, which you can get at an automotive shop. And, ad Floyd suggested, you can put a longer pipe on it for more torque.
Willem Blees, Bleespiano 808-349-2943