Chassis certified
Funny car, X door bars, Diagonal in roof, corner gussets in roof area, driver and passenger rocker bar, dash bar must be there if you dont already have it. Additional from main hoop crossbar to subframes. Then there is a few bars that must be added under the floor, you can use Thru Floor subframes, as long as the main front to back runner is 1 5/8" round or 2" x 2" sq tubing, outriggers that the main hoop and front bars tie into that must be 1 5/8" round or 2"x3" rectangle tubing. There must be a rear crossmember 1 5/8" rd tubing in line with the main hoop. There must be a front crossmember 1 5/8" rd tubing that can double as tranny crossmember if done properly and mounted in the correct location. Ther must also be a bar under the driver seat that ties into the subframe connector and the rocker bar.
There is no requirement for going thru the firewall or double frame rails.
Here is a link to our 25.5 cage in a mustang, you will get the idea of what is required.
http://www.wolferacecraft.com/instal.../25-5cage.aspx
We will be coming out with a 25.5 cage kit for the f-bodies soon.
Charlie


