No elec packs, standard bleed. New version of the GeNX for the -8 WITH bleed air, remember the 747 is an Air driven A/C (leading edge, hyd. pumps..).
Flight deck common with -400 for same rating with little differences.
RAT required for the first time since the big engines don't guarantee to power the accessories via windmilling up to landing speeds.
Rgds 16