Once the engine is open, it's total magic-land for me... so i'm sorry for the dumb question that is about to come.
When you change bearings like that one, what is the procedure for shimming and measuring? I helped my grandpa (meaning, I handed to him the tools he wanted) rebuild an inline 6 from a '51 chevy once, but he didn't explain this process. Are shims used, and how do you know when?