how much would it cost?

STOCK
222HP
STAGE I
JWT POP Charger/Underdrive Pulley
238HP
Improved Low End Response
STAGE II
JWT ECU Upgrade
250HP
Removes Limiters/Expands Fuel and Timing
STAGE III
Exhaust
(also ALC for Auto)
262HP
Less Exhaust Restriction
STAGE IV
Stillen Headers
279HP
Better Low End Torque
STAGE V
Ported Throttle Bodies and Matched Intake
290HP
Improved Throttle Response
STAGE VI
Injector Upgrade/JWT NOS System
390HP
Hold On To Your Seat!
STAGE VII
SGP Head Package
Package Includes (Street or Race Port)
& Five Angle Valve Job
420-430HP
Better Throttle Response

could anyone give me an idea of how much it would cost to do all of these upgrades? or some of these upgrades?

Intake is around 200
Underdrive pulley is around 180
JWT ECU is 600
Exhaust is around 600-900 depending upon brand
Headers are 540-640 depending upon where you guy to buy them
NOS is anywhere from 500-1000 depending upon what kit you buy

All depends on what you are trying to achieve. I'm not planning on racing seriously, so I'm not going to go past Stage V. I just want mine to be a sleeper, a stock looking Z with as much horsepower as I can squeeze out of the N/A without going nuts with things like NOS.

Nice 2by2 Z-knowphobe...

But the NA 2+2 is a bit redundant...at least for us in N.America. Hehehe...just kidding w/ya...welcome to the forum.