[Soyo]

alright heres some info that may help a little:

first I'd say rebuild the engine, port and polish, low compression forged pistons, forged connecting rod, increase bore slightly for bigger pistons, forged or billet crank, titanium valves and retainers, valve springs, camshaft, cam gears, rods, gaskets, manifold, and throw a heat shield or two in if you'd like

then some other stuff:
in ( ) are some examples of companies that make that product

cold air intake(AEM, INJEN)
exhaust(A'PEXi, HKS)
downpipe
light weight pulleys(GReddy, ASP, Vernier)
header(Hotshot)
fuel pump(Walbro I think is one)
high flow fuel rail
larger injectors around like 650cc should work fine(Nismo, Denso)
iridium spark plugs and wires(Denso, Splitfire)

yea well I think you can handle anything more on your own, good luck and let us know how things go