If your going to try to weld it, then a high temp preheat is needed, and you have to hold that heat on it. Use a cast iron rod as filler. Almost better to gas weld it. You can do the pin deal yourself, there maybe some that are inexpensive, but the locknstitch ones are very pricey. The heat is likely to distort it and it will likely need to be bored or at least honed to check it.
