Modifying a 1968 dart door latch for a 1970 dart or duster.

Has anyone tried to use one of the new reproduction 1968 Dart door latches on a 1970. I was looking for a Nos drivers door latch for a 1970 dart or duster, but never found one. I have found some used ones as a backup plan. I started looking at the pictures of the reproduction 1968 latches and the only differences that I can see is one of the arms that a piece of linkage connects to is slightly different. On a 1968, it has a ball sticking out of it that the linkage clips onto. On the 1970, the arm just has a hole in it. It looks like you could grind that ball off the new 1968 latch, and make sure the hole is the right size, then have a perfect fit. I wish I had a 1968 latch here to verify that. Let me know your thoughts or if anyone has done this.