Jet, a few things come to mind....
If you are going to go with big HP and run the super unlimited, you will need to lighten the car as best you can. CF doors, CF fenders, CF hood, CF trunk, lexan, drop the entire interior, etc.
If you are going to lighten the car up and run big HP, get a NASCAR style cage. You are entering an area with your car that can bite you with only a very little mistake. I have driven a Z such as yours and say this from the heart...don't skimp on the safety stuff with that kind of performance. You may not live to regret it. It's not the HP that kills you, it just can kill you faster. If you are lucky, you only end up
If I am reading correctly, you are an HPDE'r and have not actually raced yet. I REALLY suggest you think about starting with less HP before you crank it up to that level. Remember the saying "you have to slow down to go faster?" It applies to the learning curve, too.
Figure out what class you want to run
before you dump a ton more money in the car. You may find you built a car that won't compete and has a very limited area to run in. I have seen a lot of people build a car that is just useless and then spend just as much making what they should have in the first place. One suggesting I have is endurance racing. It's more about car preservation and consistency. Don't get me wrong, you're still hauling ass, you'e just not at full tilt the whole time like a sprint race. I think they are great and every racer should try them. Some try them and don't go to sprints again.
lastly, you are entering the point of no return with the streetability of the car...even for weekends. With the mods you are doing and where you are going with it, you really should decide if you want to drive it on the street anymore. Oh, something to think about, CF parts are not designed for street use due to their make up and their ability to stand up in a crash. Again, think about your safety level and what the car is
really being built for.
Just some things I think are important. GL with whatever you choose to do.