There is not alot of performance parts for a 5sfe or 3sfe due to the f in the engine code stands for economy head. You want something with ge. Sport head of better flow. Now A lot of people say 5s dont hold up to high rpms. Dont know how tru that is. Trd never made asupercharger for 5s to my knowledge. Now with some minor modifcations you can put a 3sge or gte head on a 5s block. Can fild a write up on celica tech. 3SGTE in a good swap but you said that you have a 240 with an sr. Lots of info on celicatech.com for this but its not cheap. Now for the 2j. That is a straight 6 cyl. And is for rear wheel drive. Major body mods for that. Hope that helps.