I tried the everlast pulleys that Magic references but had too much trouble with rolling and twisting. As a result, I reverted to a cheap cast pulley set that will not overrun. I did have to do some lube and run in to make them run smoothly but after I did they work pretty good. Out of the package they are fairly rough and may need some attention but at the price (about $4 each ) they are worth the effort. If you have a grinder with a wire wheel you can run in a set of cheap cast pulleys with a little lube and a run on the wire wheel. In an extreme case try a little abrasive rubbing compound to get them smoothed out.

The cast pulleys are heavier and gravity helps them find the proper orientation when lifting a load that is their biggest advantage. The plastic everlast pulleys run smoother but they tend to twist and turn too much. They take an extreme amount of attention to keep them running true.