In the december issue of off-road adventures mag from 4 wheel parts that they send every now and then.  the letters and stuff section there is an 81 chevy and the person says that he has a 2" rancho lift with 4" scissor shackles up front and 2" rancho with 4" scissor springs in rear.  What is the scissor springs and shackles?  Any place to look at pics or something about this? thanks