I just got a 240z about 8 months ago during the summer. I put a l28 in and it has something like 36k original miles. I am only a Junior in High school and of coarse I have to think all the possibilities of the car. I'm sure some people know of the manga called "Wangan Midnight". I don't plan to put those fender flares, but someday with either this car or another 240z if i get one in the future I would like to bore out the engine to 3.1 and add a twin turbo. I doubt i'll have the skills for awhile to even remotely do any of the work all i've learned so far is taking off fuel injection and adding carbs and small stuff but how much would something like that cost including a roll cage and strut bars and anything to prevent the car from being destroyed from intense warping?