Just for anyone who is trying to do this in the future, I figured out a pretty easy way to replace these bushings.
First get the clevis off however you like. There are lots of threads around on how to drop this.
You don't have to separate everything in the suspension to do this method, just enough to make some room.
Rent the ball joint press from autozone. People are right that this won't do it in one whack. It's just not big enough.
Start with a torch, and fire it through the center sleeve of the old clevis bushing. You don't want to light the rubber on fire here, you just want to soften the bond to the center sleeve. Now use the ball joint press with none of the cups or receivers it comes with. Just use it like a giant C clamp and drive out the center sleeve, preferably with an impact wrench. Should come out like a hot turd.
Now take a sawzall or similar and reach into the bushing. Cut upward through the rubber and just through the steel shell of the old bushing. This will make some smoke. Stop before you nick the control arm.
Next take a punch or big screwdriver and tap inward near your cut, to collapse the bushing shell a bit and make it easier to drive out.
Take a big socket (I used a 30mm impact socket) and small sledge and drive out what's left of the bushing. It will come out really easily if you have cut all the way through the shell.
Now drive the new bushing in to the same depth as the old one, using the socket and sledge. I oriented the bushing so the clevis bolt would not be pushing right down on the split in the center sleeve. You'll see what I mean.
All in all it took me about 1.5 hrs to figure out the first one, and the second one was out and in in 30 minutes. That was $25 in bushings as opposed to $400 - $600 in new arms.
Here is what the old ones look like, to give you an idea of what you'll be doing. I didn't stop to take pictures during the process because my hands were too dirty.
