Just got mine torn apart and it would seem that my input bearing is only 16mm which is the BK241B rebuild kit. My transfer case seems like it was previously rebuilt a while back so not sure if bearing was replaced from 24mm to 16mm as my input gear looks like the one on this writeup. Not really sure but I did find this website that goes over the input bearing width. Hope it helps someone too.
https://torqueking.com/product/sku/idn-401-np231-np233-np241-np242-input-bearing-width-tech-help/