There is a table of turbos giving wheel sizes at gnttype.org. The 54 uses the same 60-1 wheel as a 52, 60, 61, and 62, and the same exhaust wheel as the 61. Harry's personal car has been 10.50's with him driving (3500 lbs total), with msd50 injectors and a fast system, with a 54. He told me that he had two customers in the high 10's, as well, 3 years ago when I bought my 54.
