I got the bolt out. It was fairly stripped, but if inserted all the way it had some decent grip. Pounding a socket over the top was going to be nearly impossible. I tried heating the starter with an acetylyne torch, since it is the only part that the bolt screws in to. I thought it would expand and release the bolt. I tried it about five times with a friend on the torch and me on the bolt. It did nothing, would not budge. I tried pounding it. Nothing. I tried liquid wrench, no movement. We heater the bolt head with the torch for about a minute, my friend advised against it thinking it would expand the bolt and make it worse. However it popped right out with minimal effort on the first try. Amazing.