Drivline angularity is a science initself. Drivelines have to have an angle or Ujoints dont work right. I cant remember the exact science, but it depends on the length of drivline too, and the angle of the engine transmission. If i remember right, a just straight driveline without and angles will vibrate like heck, because of the speedup, slowdown effect of a ujoint...Dang im gettin old... I used to know the science and set up big trucks that had frames stretched, and drivlines lengthened and shortened... oh well... LOL.. i think i could draw a picture..but cant here...hehehehe
