64' Dart Rollcage Build: opinions wanted

I've build acouple off-road Jeep rollcages, but this is my first for a car i'm planning to run at local dragstrip. I might try to get inspected/certified possibly. I've read the IHRA rules and think i'm pretty close, everything is just tacked together. I looking or opinions/changes or ideas......

I attached to sub-frame connectors to where i think is the best place. next i'm gonna do floor pans/truck floor etc.....

afew pics;