How were the A bodies put together down the assembly line?

Thanks for posting some interesting pictures. First pics look like 72 Duster at Body Drop meeting conveyed drive train. The one that I saw had a crane operator in a cab moving the the body into position with workers on floor waiting. One per minute. The last Pic looks like final line before the rolls. The Dart? is on the flat conveyor, gets fluids, fuel, final trim, hits the rolls then a repair hole or in line to leave the building.