A Body Hood Hinges, what's the difference?

I have two sets of hood hinges that both came off of Darts, one was definitely a 1972, the other I can't remember the year. The bolt holes on them are different, they are slotted in different directions. Different year get different design? I will post picture after resizing

Anyone?

The hinges on the right are 67-72 the hinges on the left are 73-76.

Thanks!