a/r

i dont know what everyones been running, but i want to buy a new turbo, this guys is selling me a ball bearing turbonetics t3 t4 turbo, it has a .63 trim compressor and a .48 turbine, now my questions, does anyone know if i will have complications with it?? of also i wanted to know what sizes...

For a straight T4 60-1, a .96 "O-trim" turbine side AR is far to large correct? I'm seriously considering switching down to a .58 AR housing. Any thoughts on this? Thanks.