this is all some really good info thanks guys, as for the TBi6 convertor ive been lookin for one but have no luck...as for if i do the 220 alone would i be able to break into the 13s? as for heads and cam im sure itd be possible....as for heads/cam plus boost id like to still be in the 13s if i do decide to lift it lol, does this sound possible or just like im dreaming too big lol?