The biggest thing that worries me (ignoring the whole going non-turbo evo) is why did he have the whole engine out of the car to just do a turbo upgrade? Sounds to me like theres another issue there, unless he was swapping everything onto an Aust delivered CC. Have you looked into if the car is rego'd? And if it's not, if it can actually be registered for road use? I thought the earlier model evos could only be brought in as personal imports, or was that only the 1-2's?