That would show the change was early 74. He didn't have a clue they were different, but took it hoping maybe his was that one. I have one of each in clear yet for the passenger door, so know exactly what the difference is. I also have extra 74+ regulators, was wondering if he could change it. Pretty sure he does not want to change doors. Sounds like he has a half decent 73 340car and is trying to change to tinted glass.