Josh.
You should of noticed by now that 1G Turbo and 2G NT have totally different Engines.
Simply put your 2G NT has a Neon Engine. Totally different, you will not be able to use any Parts of your 4G63 (1G Turbo) on the 2G 420A. Same if you were to get parts of a 1G NT.
Your best bet is to put some Headers, Catback and an Intake. You could probably get a Chip of some sort and maybe a Cam but that is pertty much it unless you want to pump lots O-Ca$h into it.
Keep the 2G NT stock and put the ca$h into the 1G. 4G63T is where the power is.
Belive me I use to be a 1G NT guy...
Ghislain.