We could do it. We just couldn’t do it with THAT technology. Largely because it’s just too old and crappy and we just can’t replicate it anymore. There was a balancing act of bad technologies helping each other work in spite of how cruddy they were. And of course it was all built from machines with the same balance of crappiness going on.
It would be like trying to make a brand new as it was Model T. We just don’t have the stuff to make machines that bad but still working anymore.
This is like a heavy wind picking up a plane smashed into a thousand pieces, putting it together and getting it airborne again...
The crap technology was just what it seemed—crap technology.
Most of the parts, except trivial stuff like oil filters and tires, can't be had new because they haven't been made in years. Think of the factory production lines that would have be set up to make everything from wheels to pistons.
That's the vintage of equipment and engineering practice we're talking about.