What makes you think your turbo is worn out.
When I put mine back on at 165k it was still tight no shaft play.
That is with 30,000 miles of 30+psi and 70,000 miles of above stock boost levels
well its not a matter of knowing its worn out, its just prevenitive maintance the way i see it but from talkin to scott and a couple other guys i dont have much to worry about. I jsut like to cover all my bases so to speak. i figured at the time if im gunna put a twin to it i may as well get the stocker redone. Ill check the shaft play here in a week or too jsut to make sure its not wearin out on me but otherwise im jsut one step closer to the twins if all is well