The cage will be certed to 8.50. There is a guy I know with a SBC and the same Turbo's I am using on e85 that is running 7.90ish and his car weighs about the same as mine. Mine will have a Street Tune up with 91 Octane most of the time. I should be able to drive it to the track and bust out at least a 9 sec pass and drive it home when I am done. That is the plan anyway's.
I tell you what.... It is not even welded off yet and it has already stiffened the car big time. It will sit on 3 jack stands easily without moving. With the New Radiator Support, Subframe Connectors and the Torque Boxes I added Front and Rear to the car along with the Cage & the Reinforced K Frame it should be pretty stiff when it is all done.