When you start the job soak everything down with a penetrating oil do it with it warm and let it sit until it is cold. Expect every stud to break, and possibly manifold bolts to break. If you do not want to do the job of drilling out the broken pieces, and bleeding do not start it. You will need access to another vehicle to get parts, tools and stitches. Just a thought!
I worked mostly on Diesel Class eights and "CAT" taught me how to do it. Many a gas manifold bolt have broken off and Ford clutch mount brackets. Some you could just put on a blob of weld and then sticking the electrode on there, for a minute, then let it cool and tacking on a piece then letting it cool and it would come out. The bad thing about welding is once you do drilling is very difficult after.
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