White regal in my sig... With the ta61 and 23psi it was running consistant 11.2 at 121 plus.
I sold the ta61 and went with the te64 .. that is not the 66 millimeter turbo like the te45a. The 66 would be too much for stock heads.
My heads have never been off on my white limited in the sig.
So, i opted for the 64 since the 63 is a small shaft turbo, and the 64 comes up fairly good with a 3600 stall. There is a fine point when you have too large of a turbo for the small stock heads, i did alot of looking and talking with friends, 66 is too large for stock heads, you will have to run alot of boost to make it work.
I do have the stock longblock too, so thats what i opted for, not too small like the 61, and not too large like the 66.
If you go ball bearing, then blow the heads, then you will be porting the heads and getting a larger turbo anyway.
My blue limited, 60s, te46a (66mm) .85 housing,2004r , 3500 stall, .020 over and a 214 cam. Blows the drag radials in any gear at 22psi .
HTH
BW