ORIGINAL: redgt2000i got that setup, 2000 gt body cobra crate engine, i got a tko 6 speed cause the gt 5 speed wont work very well haha found that out the hard way,... forget the irs.. though, i prefer a cobra with the solid rear axel gt setup. i swear off the line feels way more firm in mine than in my friend bill j's 03 stock cobra. his is way better in the corners than mine but i dont mind,the whole process can be done for cheaper than buying a cobra , IF you have the gt already. you also might as well get exsaust, flywheel and improved clutch parts for the tranny as well cause your car will love you more. and stock f bodys will tremble by your mere presents