hi I have powerflex bushes on the top front wishbone and rear trailing arms, handling was massively improved quite happy.
The only problem was the rear left and right trailing arms the bushed they supplied didn't fit due to having non standard arms had to make new bushes so would check sizes first.
The rear bushes are pressed in, you will need to press out old then refit new, you can make up a tool using stud bar and sockets to do this.
If you fit lower front wishbone bushes the metal sleeve will need to be put on with lock tight as the sleeve can move under load have not fitted these yet but I am considering it.
This is just the problems I had hope it helps.