Roll Cage/Subframes...?

to me a rollcage is just a comfort thing..when i was 13 i was in a ranger that rolled 3 times and ended up on its side.. when i crawled out of the windshield i scratched my back so bad that i had to get 250 stitches from my ass to my shoulders... if i'm going to go fast im doing a roll cage ...

I have a copy of the 2007 NHRA rulebook and the new SFI specs book. The NHRA rules have slightly changed this year. A 5 point roll bar will not be required until you go 11.49 or quicker. From 10.99-10.00, you can still run a roll bar if you have the stock firewall. The floor pan has nothing to do with chassis certification until you get to a 25.5 chassis. If you run 10.99-10.00 and have modified the firewall, you must run a NHRA certified cage. 9.99 or quicker or 135 MPH you must have a NHRA cerfified cage.

I used to build chassis for a living and there are all kinds of different cages that will statisfy most NHRA techs doing a 10.99-10.00 certification, but you have to keep the fundamental purpose of a cage in mind, safety. A cage should at minimum have two halo bars (hoops) coming off the main hoop each connecting to a floor mounted front hoop. There should at least be a halo crossbar with seat supports, and a diagonal main hoop brace that attaches at one end no more than 12" from the drivers helmet. The main hoop should have at least two straight rear supports. I also used to always put a x-brace crossbars on the rear supports as well. A dash crossbar is optional on the front hoops, but it is a good idea.

It will all depend on how fast/quick you realistically expect your car to go.