I'll stick with my bolt-in autopower rollbar over a cusco deathtrap "cage" anyday.
The op car looks like a dedicated track car - any idea why he didn't go with at least a 6 point weld in cage?
It's an Autopower bolt in. Not sure why it's not a weld in but either way if he welded it wherever it was bolted I'd expect the same result. A bolt in cage or weld in is only as safe as it's mounted. In this case it looks like straight to the floorboard.