69 Dart door jam question

I've owed my Dart for almost 20 years. Worked on it off and on and this looks like the year for the Dart. A friend was over looking at it because he is going to do the bodywork on it. He noticed the door latch jam stud had welds around it that doesn't look factory. Both sides are the same. Is this common or did someone try to beef it up for drag racing?
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