Those are fantastic! You must have a great machine tool collection.
I have a life long ambition to make working models of IC engines. I used to read articles in magazines of guys making such engines. I now have enough tools to start making them, but not yet the machining skills (never took machine shop classes in school.)
So far I have been content with making non-operating replicas of real aircraft and racing car engines (working on 270 Offie now).