The SCCA rule book is available for free download and the cage rules are pretty well defined. NASA basically copies SCCA safety rules. I think, kind of like ASSuming, you need backing plates on the underside of the floorpan for bolt-in cages. The lay-engineer in me likes your idea but I don't know if it will pass tech.
Jealous of a clean FC shell. Makes me want to build another ITS car.
