30 years ago I bought an NOS mirror like that for my 67 Barracuda. It came with a paper template to layout the holes for installation on different models. I remember that when we tried to lay out the holes with the template, the mirror was in a different position than the drivers mirror was. So we just measured the position for the drivers mirror , and installed the passenger mirror in the same relative position. The mirror will not move far enough in adjustment to be very useful. I have always wondered if maybe the factory intended it to mount a little different than the drivers mirror so it would work better, or if we had missed using the template properly ?

------------------------ It doesn't matter what you do.........As long as you look good doing it !