Hey, im switching my truck from 2wd to 4wd, i have a 4wd frame and everything needed, but the 241DHD came out of a nv4500 truck. I know that i need the 23s input shaft, but i herd theres a 23S wide, and narrow bearing input shaft. do i need the narrow one? i think the wide ones where for the rare nv4500 that had the 23s output. THANKS!