I have a 50 trim t3/t4 turbo .48 exh. on my car right now.......I was wanting to upgrade to a nicer more modern technology turbo but I wasn't sure what would be the best??? This is gonna be on a drag 2 mani, drag dp...( i know!!!) but I dont have the funds to change the mani and downpipe right now........so GT3076r, gt3071, gt35r???????????