Well, I'm planning on using a set or darton sleeves on a brand new ITR block, in my case becuase I put a hole in my old one, I was forced to buy a new one. Any way, the Dart block is a good foundation, but realistically, isn't at all necesary, even with a crazy turbo setup, for a fraction of the cost, you can have like AEBS or Golden Eagle sleeve your block to anywhere from 83-87mm which at the high side of 2.1 liters is pretty damn big. The Dart block is over 2G's and that's not inlcuding anything other that the actuall block it self, and I mean nothing. You'l spend at the very least another thousand bucks on crank, pumps, bearings, and other stuff just to get it even close to being usable. In any case, if you're asking my opinion, the dart block is a nice piece, but much like a Mugen valve cover, it really doesn't do a lot for how much it costs.

Later,
Aj