Breaking it in has nothing to do with the strength of the rods though, they're the weakest part.
If you can't afford rods, buy a smaller turbo, its honestly such a waste of time not doing it.
If you want to run it in, run it in on the K03 with the N75 disconnected, just run actuator pressure.
I aware that the rods are weak this is not the first big turbo car ive had just the first one im personally tuning. And as stated before I will be doing a rods and pistons and if this spare block is good im doing a stroker motor. I just want to get a base map so its driveable on the big turbo then will get them done. It is not like i will never do them I plan on it.