Nice engine, I must go out and get me one of those four axis machining centres, plus a new house for me to fit it in, Oh! and I won't forget to pick up a new Bentley while I'm spending my loose change.
A very nice job by the way, and if he went into to production, that would be the way to go, but unfortunately, I wouldn't class it as home shop machining.
But he is only playing at it. Conley has been producing these sorts of engines for a few years now, and is classed as one of the best.
http://www.conleyprecision.com/Bogs