you can get the bolt out....any good hardware store, or Sears, carries several different kinds ofextractor tools, and since you have the bracket out, it won't be too bad....basically, you drill a hole in it, and use an extractor, which looks a little like a tapered reverse threaded drill bit, to get it out. It's a little easier to drill if you have access to a drill press. If it's possible for you to grind the bolt end, try grinding a slot in the end first and taking it out with a big screwdriver.otherwise, buy an extractor, and have at it. Once you're done, save the extractor for when you remove your manifolds......