9 to 10lbs of boost on a stock bottom end will not hurt it if tuning is done right. There is very room for error with nitrous. The avg H/C car dyno's low 400's. You will need to spray a 100 shot atleast to get good numbers. A good H/C will cost you 3k minimum. Not including the install labor and tuning. A good safe nitrous kit with all the safety features will cost you over a grand. So now you are up to 4000 plus. Not including all the bottle refills and possible race gas on occassion. You can get a supercharger setup for just over 5k and you can have it installed for less than 1k. Now you have just increase the value of your car. Tell someone you are selling a nitrous car and see how fast it sells.