What changes? The tolerances should be the same regardless of engine HP, stroke, bore etc. Just because you're making more or less power doesn't give the crank builders a pass on quality.
No, I don't. That is what my builder is for. I pay my builder do the initial set up on my motors. Cameron has built my last two and my brothers last two motors. He has always pre-assembled them before I had them. Again, that's why I pay a builder to build my shit, because I am not one.
So you think that if you order a cold air intake for a vehicle and spend $300+ on it, that if it doesn't fit it's OK because it wasn't stock? Fuck that. If anything, it should fit better because it is considered an UPGRADE, just like the aftermarket cranks should be.
Apples to oranges. Those guys building those motors put them together all the time and of course they check them. Should the driver or owner of the car have to double check the motor builders work? I think not. That doesn't even make any sense. Otherwise, the owners and drivers of the cars would assemble the motors themselves.
Maybe stock cases weren't but billet ones were. Explain my junk ass broken 18mm Crankworks crank? My 18mm DM was assembled completely when I got it by Cameron. Should I have to pull it apart and double check it?