[Healeys] Drive shaft alignment

[Mark J Bradakis]

Universal joints are NOT constant velocity joints.  Sure, if you
apply 10 turns at one side, you'll get 10 turns at the other.  If you
apply a constant 10 rpm at one side,  the *average* at the other
will be 10, but it will vary.  I can't remember the actual math from
the physics regarding the different angular rotations involved, but
I do believe that the U joints do need to be aligned, not 20 degrees
off.

mjb.