Shoulder belt clip

Can someone get me a measurement as to where the shoulder belt clip is mounted along the roof above the doors (the one that holds the belt in place when not in use). I have a 74 Dart Sport, I would imagine any of the similar body styles would be the same.

If you could measure from the center of the strap mounting bolt that would be great...

Also a pic would be great, I don't have the clips, so I will probably just fab up a couple.

Thanks in advance.