i took a sawzall and cut the ends of the bushings off so all that was left was the rubber inside of the spring.then i took a small screwdriver and shoved it between the rubber and spring and sprayed wd40 in there.did this all the way around the bushing.then took a 3lb sledge and a drift and knocked them out.
it was still alot of work.
i just installed slide-a-links on my rear. i was able to drive front bushings out quite easily with a bearing race/seal driver and a big hammer. in the past i have also used a ball-joint press with impact wrench.
Like 72ventura said.Use a drill and drill as many holes as you can.Eventually the drill bit will start grabbing the bushing and acctaully spinning it out.
I am not sure if you watch the powerblock on spike.But when it opens up every week and it shows different clips of the guys working.It shows them doing just what I am talking about.I was was banging my head over trying to get these out and tried this.Not even having it suggested to me.A bunch of rubber shavings later and a little time and I was in business.
I had to go over to my buddies to install my new bushings.He has a shop press.Of course there solid competetion engineering one's.....