Oh I was talking to fuel system, were you talking the whole engine? or is a cgi block something else?
Hypermax makes a Compacted Graphite Iron block and it sells for $10,000. I did see the machanical fuel system was sold as parts or a complete engine. Not sure how much parts would cost, but I'm sure the engine is over 10 grand. New front cover, heads, valve covers, pump, and lines. I'm sure there is more to it than that, but that's just a short list off the top of my head.
Wonder what one of those engines would do with a P pump, bigger turbo and a little tuning?