I don't know if you are still interested in this (I haven't caught up with my 1256 unread posts yet!) But - although I have not tried these bushes- I have had problems with after market bushes. They are are either too sloppy or they don't last long. We have just (last Friday) grafted on Transit bushes to the original shocks. The effect is amazing and the handling has improved so much- it just took some cutting and some simple welding. So far they aint broke. Hope this helps.
Mike