HI!!! Welcome to the site.
Well to be overly simplistic about it, all you need to get 320hp is an HTV1320 supercharger.
Cooling mods(hatrickstu mod, dual pass, etc.), a nice header(Vibrant, CTI, CIA, SLP) and a quality 2.5-3" catback(preferably 3"). a PROPER tune and the Harrop HTV1320 suspercharger should get you to your goal.
You should really think about pistons if you wanna play hard.
If you want much more than that it really is easier to switch to a turbo.
PS: Meth is a power adder. Not a cooling mod
