The 6.0 and the Torqshift handle the power beautifully. Some have dynoed at about 450 hp with a module and propane. I would think that is close to pushing it Variable/boost proportionate systems come in smooth and steadily increase power as the boost increases, so they are very drive able and really great for towing. As long as you have a module designed for towing, or at about 80 hp they will work very well together and be very friendly to the drivetrain, as it is not a big jolt of power all at once.