Many times during my restoration I wondered how in the heck did they do “that” in the factory. Recently I have tried several times twisted like a pretzel to secure the speedometer on the back side of the dash.
That’s the most baffling task for me as to How they did that on the assembly line. Other items I would love to have see them do is installing the bolts behind the fan blades, aligning the hood, installing the hood spring and installing the rest of the parts behind the dash.