A big difference between the nascar stuff and drag stuff is the variences in body styles - nascar has a template that the bodies conform to and all cars have the same track attitude. Engineers can develop a safety device that will predictable work for that template at that attitude. Drag race is entirely different, all the cars are unique and that is the nature and character of drag raceing. The other problem is the time, nascar cars have huge tracks and when something happens they have enough time for wings etc to popup and take effect. Drag cars go from happy to hospital to a millisecond.