I remember seeing a thread where on guy built a frame which sat at the same level of the top. He backed up to it and then just slid the hardtop on the frame.
he made it out of some 2x4 and covered it with old carpet to protect the edges.
So once it was unbolted he stood in the frame opened up the tailgate and then just lifted it onto stand. No cables no pulleys, just a one man show.