Why would you want a gsr tranny with a turbo? The LS tranny is better than the gsr for turbo applications simply because of longer gear ratios. If you ask me, the h22 thing is too much of a hassle, and if the only reason you are doing for is to be different, that really isn't worth it. . . Plus it's a pretty rare thing and very few people probably have the knowledge to do such a swap correctly without doing it half ass. You can go plenty fast with a decent turbo set up, plus you don't have to deal with all these random pain in the ass engine swap issues.