I removed mine to install the Global west kit using threaded rod, a stack of large washers, and some angle iron. I took a couple of my Craftsman chisels and used them to pry open the spring where it wrapped around the bushing. It really was not all that difficult.
i did it to both springs when i installed my aluminum bushings for the caltracs while on the car. I used a 3/8 drill bit a center punch and hammer. I drilled out the rubber bushing with a bunch of holes and then beat it out. I didnt even use a press to install the aluminum bushings.