I had the top end of my engine apart for fitup, but that doesn't help much either... I can say that they fit up very nicely relative to the stockers. The interiors are not domed, as this would have required far too much extra machine time.
I've also looked into a few local foundaries that specialize in small batch (1000+ lbs) heats. I would need far more than 10 sets to hit this, so I can't even consider the price yet. Plus, we'll still have to have them machined afterwards. Maybe if we start getting some traction, casting would be an option.
i REALLY can't wait to see someone take these, paint them black and then polish the edges of the fins on a similarly painted motor. that's what I plan to do if/when I get a set!