I say build the suspension, get some safety stuff in your car, pray that eveything is going to be OK and do it. I would have everything checked atleast 2 weeks prior to make sure everything is up par. you are going to need a wing for sure. Also find a track that is ling enough to do this and make sure you have alot of assistance in case of emergency. Gear the right, get a big rear wing and a front spoiler. If you have wind sheild wipers and anything that is loose on the car take off. Make a video and take lots of pics.
May God bless you on your trip to the 200mph club, and may he keep you safe all the days of your life. In Jesus Name.