Help with my first engine build (5.9 Magnum)

Some days go better than others. 7 exhaust studs snapped off in the heads. Luckily, they were still sticking out a few inches so I was able to grab them with a pipe wrench and back them out… except the last one, snapped off flush, fought me for a few hours but I finally got it out. Welded a couple dozen nuts on trying to break it free.

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