Oh my, the nostalgia is acting up again.
It's been a very long time since I worked with one of these. If you think Model M keyboards are sturdy, well, they ain't nothin' compared to this case.
I know actually retrofitting (!) it with modern guts would be an exercise in frustration, but... all the computer nerds in their 40s would think it was totally rad.
Sigh.
I bet that's even an original monochrome display card. And it sounds like it's still functional -- all it needs is a PC/XT keyboard, a 5151 monochrome display, and a 360K IBM PC-DOS system diskette.