That's kinda what I was after JT, tube will transmit buckets of torque.. The 1:1 cars we drive could be so much more efficient if the auto mfgs would stop making
everything from steel and start using more light metals and composites. There I go dreaming again.
Anyway the idea would go far for someone to make custom lengthened drives.
I think they'd give some real mileage used as centerdrives.
They would hold up a lot better on a vehicle that weighed less and used stronger A arms also...