I agree with Donny, but also, gussets... You basically have a cube, there, with the front end weakened by having the extra bend to fit our dash. I understand the "it certainly can't hurt" thought, and I agree, but triangles are way stronger than cubes. Adding 2 tubes and a couple tube gussets would make this 100% stronger than it is, right now, and double as handles.
1. angle brace across the behind-the-front-seats hoop, from passenger floor to behind the driver's head
2. Across behind the driver's back, meeting at the widest point of the cage (similar to the rally car we built in college, below)
3. Bent tube gussets on the inside of the bends, same angle as the bends, at both the top "oh shit handle" bend, and the "right above the dash" bend.
1 and 2 will at least keep you safe for this, and 3 doubles as grab handles while strengthening the front part of the cage.