There are people out there, you know who you are, who have otherworldly talents. Like the guy who built, from solid billits of steel on his own mill and lathe, an exact replica of a 1970's Chrysler Hemi engine that is as big as a shoe box.
Don't take my word for it, go to: craftsmanshipmuseum.com. They have a little movie clip of him starting it up, you heard me, it runs. It even torques on the mounts like a muscle-car engine. It has it's own perfect scale radiator for water cooling. Every single part, valves, springs, everything, is reproduced in, what is it, one/fifth scale or something. Everything that is on the original blueprints.
These guys are nuts, but I mean that in a good way, not like there's anything wrong with it.