Ridetech is a sponsor here. You should call them up and talk to them about your application. You will find there are a lot of these cages out there now and many happy customers.
No, they are not NHRA approved yet, but Bret and crew are and have been working on that, however if you are not planning on racing the car, that should not be an issue. You will not find any better quality or workmanship on a rollbar anywhere and they offer several options also. Give em a call.