Central qld. People have conflicting information on the job, and I can tell you that an n1 block isn't going to do it, because I'm not doing it again. I'm not keen on forking 10k on a rrr block to be a gunie pig either. As for properly tuned and maintained, don't get much better than a new one. And I still killed it. I know of some companies that have done it, but they aren't too keen on telling the secrets, and that's understandable.