I know this is a 'tech' forum but just can't find the best place to put this. Chit chat forum, or ? And guys, I searched did not pull up anything. Anyway, I'd like to keep my S30 as clean as possible to keep its value. I know that my 240Z is going towards a track day build but still keeping it streetable (brakes, lights, signals working, registered). This is not a daily driver, though. It has a 6-pt cage and will add box section for secure fuel cell under-floor mount (road race legal) for best safety, etc etc. But, compared to orig stock examples out there, how can I preserve its value? Do tracked Zs fetch much less than stockers if not abused? For example, will cutting into the floor for the cell and welded-on chassis bracing lessen its value, marketability? How about my engine swap? Or, it won't matter as long as the car is kept away from rust and maintained in and out? I know there are different markets out there but comments and past experiences? Thanks for your inputs.