well, looks to me like you don't know what you want to do. if you have nitrous, build up your motor for nitrous, if you want to go turbo in the future, plan ahead and do it. but looks like you are confused and want to go turbo/nitrous and all motor. i say this becasue it's really hard to try and mix a turbo and nitrous on the same car. unless you are a rich bastard, you will blow many motor with nitrous and a turbo.
Jay
Jay