Regarding crank runout and reliability: Procharger (we're a dealer), Trask (at the other end of town and we see a lot of them), Magna Charger (a riding buddy has one), and Aerocharger (installed some of them) all sell bolt on big power kits over 160HP. We've seen a lot of all of them running for years with stock cranks (that's how all of them advertise their products for use and installation), also high performance N/A builds all over town too. Seen head gasket, detonation, and driveline issues. Not seeing crank issues here so far except for the clutch dumpers and downshifters, and several of those guys have stock bikes with just slip ons and an air cleaner.
If you have enough HP to have traction issues, you generally don't have enough shock load to hurt the crank
unless yu are one of the folks that insists on downshifting and that's what I have been seeing causing most crank issues HERE.
These are MY experiences in my locale. Circumstances alter results, nothing in this life is absolute, except death. We check, but don't obsess over runout. Feel free to disagree, but don't judge me for my opinions based on what I have seen. TIMINATOR