Forged crank machining
I'm all about truned factory cranks - within thier limits. I have one on the shelf that's .020/.030. But to hang a belt driven supercharger on one and then rev it to 7K? I wouldn't use a factory crank for that if it was new... Buy an aftermarket. They are designed for more power, made of a better material, and have no time on them as noted above. No need to consider bearing speed or loads... You're asking too much.