Torque Monster !

How heavy is that "C",
what gears is it currently running?
and what exactly are you trying to achieve?

Its a 23 ft with an 11,300 gvw IIRC...
gears are 4.10s in a Dana 70

This discussion is not necessarily about what I need or can afford. But rather how the engine could be built to maximize the power potential for the application without sacrificing longevity.