Here's what i used on Stacey's engine...Tomei 1.2mm head gasket, ARP rod bolts, Nissan main and head bolts, Tomei oil restrictor, Nissan N1 oil pump, Nissan N1 water pump, Tomei sump baffle kit, Arias 86mm forged pistons and Tomei 260 deg 9.15mm lift camshafts.
When racing we used to put an extra litre of oil in it for insurance. The cams, baffle kit and N1 water pump are not entirely essential but are recommended.