would this pass chassis certification?

what weird answers.
Roll bar, 1 7/8". cage (that is 1 5/8"). You can install swing-outs, and even install a removable cross bar (chassis engineering). Bolt it down, weld it down; always a pain in the a''.
And it really doesn't help, without bars to the trunk member. Check the NHRA rulebook, online. Good bye back seat. And if you want protection; more subframes to weld it to.

It ain't easy to build for track and for street.