It is the original door, what would you like me to measure and I'd be happy to post measurements. I guess there's no true way to tell if it's original but I can add pics and measurements if that would help anyone.
Hole locations from longest forward tip of door and square line down from belt molding. With pics holding tape measure in place would be awesome ( too much to ask ? ).
You might also confirm that drivers/left door mirror is or is not in same positon on this year model.
We already know drivers door mirror is different place on 67 model. 68 and 69 may be the same.