No one has replied, so I will.
That’s a horrible idea. Horrible. Your bike wasn’t designed to jump from 100mm to 160mm. Simply no way to make it happen on that frame and still have a reasonably functional bike. And to mullet your bike, putting 27.5 on the rear might work. On the front?? Another horrible idea. And if I may ask, why would you want a 160mm fork on an XC bike to begin with? To accomplish exactly what?