installing a kit one day. but i have 165K miles in my NA. i'm taking it off the road when i find a beater car, and there it will sit while i fix it up the way i want it and take care of some maintenance issues. i've always read that you shouldn't use nitrous on a high mileage engine, but i know of some people around my town with nitrous and they say they have no problems at all, and i shouldn't really worry about it if i don't abuse it and i know what i'm doing. i've never really been a fan of nitrous, but that's mainly 'cause i've always read bad things about it. great post by the way, bookmarked.. :)