1970 Dart Drag Car (Rolling)

Roll Bars need not be certified since they are only allowed to go 10 flat...anything faster then 9.99 required Certified roll CAGE....
I asked because the side bar looks kind of low where it does not cross between the elbow and shoulder when you are sitting in the seat. I had a tech guy say that about my bar that is in my current car.

Is it a mild steel roll bar.