Impressive to say the least!
Somebody really thought a whole lot of that wonderful old engine to go to such trouble to case it and provide space for all the tooling.
That is certainly a fine example that ought to be a nice collection "Centerpiece" for most anybody's display room!!!
As nice as that build looks, I'd have to suspect that there is something "simple" that would have it running in a few pounds of pressure, rather than several bar.