Well I'm in the middle of getting a 5spd and I wanted to upgrade it such as gearing LSD etc.. any suggestions on what I should do to it before I put it in I have the HYBRID which for now I have close to 280 at the crank and later I'll prob be pushing close to 300hp+.

 

you could try to find a I30 LSD tranny or 5th GEn AE Tranny. then have it cryo treated for extra strength and reliability.