I'd "cook" it first.
Electrolysis or citric acid. Sometimes this frees up parts but it also lets you get a better look at the tool so you can decided if its saveable.
Easy outs are not that easy, but if you are patient enough they usually work.
Even better if you can pull it off, is to take a nut about the same size as would fit if the broken bolt were an exposed stud. Place the nut over the stub and weld the nut on, down through the hole, keeping the weld off the frame.
Then, with the nut welded securely on, while everything is still cherry red, quick, grab a pair of pliers and twist it off.
If you do this well, it works nearly 100% of the time.
But the timing is critical.
That is why I said to use pliers. You don't have time for a wrench.
yours Scott
