Here's another update on the cage build.
The jungle gym of a rear cage:
Here's a shot of the harness bar offset, which allows for maximum seat room.
Door bars:
Although we won't be keeping them, it's possible to keep the factory glass windows installed, either for regulations or preference. We'll be removing ours, and making some brackets to fix the windows in a permanent upright position for transportation and storage.
Thanks for following this build! It's a slow winter for this car, but we're planning on doing some awesome things with this car when it warms up.