Planning on Full-timing next spring. Have 2004 2500HD Duramax/Allison pulling a 14,000 lb Hitchiker 5W. That puts me about 21,000 on the hoof - about 1000 under GVWR. I want to put a Banks Exhaust and Six Gun tuner (or Edge tuner) to get more power/torgue as well as an exhaust brake. Does anyone know if the Allison can handle this combination or do I have to get another torque converter too? Thanks in advance for any ideas/help you can give me. Westcpr.