Turning a 340 crank, How much is to much?

i, I know its not a mopar, chev cranks are turned .100. the trick is to turn big journal crank down to the small journal size, 2.100 to 2.00. less bearing speed,= less friction= more power. these are race engines in stock and super stock, most run 7500 to 8800 rpm. another trick was to cut them down to 1.88 honda size, for less friction. just food for thought.