Well... I've only driven my Z once and fell in love and then the engine blew (I'm not going to go into details because it gets pretty nasty, but let's just say I'm not talking to a family member for awhile . I'm getting the wonderfull blue smoke and it looks like it has something to do with the rings and a rebuild is in order. What I wanted to know was, is it possible to change out the NA engine with a TT and what type of mods would be needed. If anybody has any info please let me know.