also you have to remember the trim size along with the wheel diameter which means that little section thats supposed to be straight where the damage occurred on a smaller trim is not as long a flat spot as a bigger trim. so if the trim that the.63 is set up for a narrower trim wheel the fatter trim from a bigger turbo will not fit down in the groove the exhaust wheel has to ride in and scavenge from inside the housing. but a .63 made for you trim and size diameter wheel will. there's different trim and wheel sizes for and housing in .63. say .50,57,60,61,62,66 and 67 i believe, i think even a .70 size t70 can come with a .63 housing. your boys at the diesel place may have one! good luck and let us know how it goes!