Just curious. Say I was having issues with the reared of my car and I wanted to throw some aftermarket stuff in there to fix it. What would you guys recommend I put in there if I completely rebuild it. Like what ratio and whatnot.

 

Swap to an 8.8in rear end ( the one the GTs have). Modding the 7.5in ls both expensive and not worth it, as it can't handle much power.