70 dart 470 ci drag car build.

I have a TBD inspection for my cage 3 weeks from now after speaking with the cage cert dude, I also got an idea of what I can use for driveline safety loop. I forget stuff really easy but iirc he said 7/8 by .065 chromoly is minimum thickness.
I want to get the cage certified before I get my floor built, I have plenty to keep my busy though on the car.
So I'm probably going to go with lighter weight stuff from now on.
Such is life when there's a threat of a dress and man bun.