AFAIK, there is only one s/c gen2 atx (although the number 2 seems to nag at me). i think NESS did that one, feel free to correct me on that anyone. i'd suggest upgrading your transmission, as the 93 atx was the lab rat of gen2 atxs, and not as beefed up as it should be. there are no turbo atxs. i'm not sure how similar turbo-ing an atx would be to mtx, but for general info, check the turbo related threads in this forum, and do a search for posts by "toolman", as he gave an extensive write up on what turbo-ing the SHO entails.