Thanks Greg,
Look if you take a look at the Toyota Landcruiser V8 as an example, the engine was detuned to minimise the torque, and so they could fit 'normal type' couplings and cv's. I have an 'engi' here tellin me that it would be expensive, or rather difficult to source cv's that could...
I'm interested to know if anyone can help me source joints for a carbon fiber(possibly) prop shaft, more than likely steel to withstand 450nm torque. As I am in Japan a location in asia may be best! Any advice appreciated. Volumes would be reasonably high.