Good luck man....I had the same exact problem a month ago. I sprayed almost half of a brand new can of PB Blaster and it still wouldn't come out. What I did was I used a rachet on the cam bolt and pushed it as hard as I could with my foot until it moved...slightly. Then I was able to get the bolt hammered out. It took me a really long time to get this done because when I got the bolt out I tried to get the bushing out and had the same problem.
I had to destroy the damn thing just to try and get it loose. Then after about an hour of hammering it came loose off the arm. And get the new bushing in there was no walk in the park either. If I were you though....I'd get the new bolt along with the bushing......it's just best to have them both new. Also, I don't think you're gonna be able to reuse the bolt once you get it out....I'm betting its gonna get pretty messed up by the time your done with it.
Please let me know how everything goes because ever since I changed the bolt I haven't been able to get a proper alignment on the car. The toe on the wheel where I changed the bolt and bushing is off by .23ΒΊ and that's the closest that they can get it.
OH btw....
here's my thread ......
look at all the help I got from PO.