Lil'Felt

So i know i am missing some crucial specs to my build, I'm still in the research and planning process but i figured some of the experts here could lend me a helping hand.
so far i have:

Holley hi rise intake with nitrous outlet direct port system in the intake
heavy duty starter
ported oil pump
under drive pulley
102mm nick williams throttle body
not sure on what size maf, heads, or cam
.030 over pistons for nitrous
h beam rods
4in forged crank
heavy duty engine/trans mounts
it will have supporting mods such as radiator, water pump, coil pack, double roller timing chain, fuel pump/regulator, twin disc clutch, drive shaft, half shafts, stubs, suspension, and tune. also i plan on running 2 stages of nitrous, more then likely one stage 100 second stage 200

currently i have a lq9 already with ls1 intake long tube headers slp loudmouth, cam, injectors and some other miscellaneous items. my question is, can you guys help fill in the voids that i am missing. it will be going in my 2004 GTO with a built T56 and rear.
thanks for any info thrown my way.

AAK z28

iTrader: (18)

custom cam
some type of nitrous controller possibly
head studs

Lil'Felt

Oh in sorry I plan on getting arp bolts to put the motor together, and I have a window switch and progressive system already.