Most places I've used and my understanding is to blue print is measuring everything on the engine, write it down, and correct the specs back to the tolearnces for that manufacturer's specs, to ensure longevity and performance.

Balancing is exactly what Jerry described. IMO definitely worth doing. On a lot of the 5.9 cummins cranks I've had done, they were 40 grams out from end to end. I wonder why they shake so bad stock?