Forged pistons, RB26 or just balance and shot peen stock rods, Nissan or ACL bearings, Metal head gasket, N1 oil pump with Billet gears if you dont want to go a good oil pump, Head drain/return, IF he's building a dedicated drift car id go a larger baffled sump ASR or Hi Energy.
What power figures is he after also how reliable does he want the setup to be?