383 Broken exhaust stud please help!

I once had two broken bolts on an old Ford flathead V8. One was a head bolt, and the other was a water pump bolt, …that was bolted to the block from “inside” the water pump. Both breaks left me with a small stub to grab on to. This was a 1951 engine, so I was sure I was screwed. I went onto a flathead forum where the old/timers told me to alternate applying a torch and penetrating oil to the bolts. It took about 5 times before i got any movement. I also shock-tapped them with a hammer to loosen the threads. With vice grips on the stub, I tapped the vice grip handle in both directions and got a slight movement each time. Soon I was getting a quarter turn and then more. In and out. I got both bolts out and had zero damage to the original threads in the block. It took a lot of patience.

in this case you may be able to get traction with an easy out, but try the heat and penetrating oil first to help loosen it.