Been reading all this and thought i would add one thing. When a u-joint is angled one side speeds up and the other side slows down hence loss of hp. So the idea of both joints being opposite but same angle would cancel out the speeding up and slowing down. I would still like to have them straight as possible but very hard to get in a regular chassis. The best joint would be a CV(constant velocity) type, no speeding up or slowing down.