I've built a few and there's been a host of issues. Main studs pulling the threads out of the block because the holes are a tad big, sleeves splitting all the way around the cylinder just below the deck, motor mounting points pulling out the side of the block, porous casting may leak water into the oil, shall I continue? lol Granted most all these issues arise on boosted and N2O applications. Staying NA you may never have any of these issues.

Arrow does all the machine work for these blocks as well as the new one that's in the system but doesn't show a release date yet. It's slated to retail for $5900. The new version looks to be far superior than the last go at it. I've got some pics of the new one that displayed at SEMA a few weeks ago if it'll let me post them.