10's on $5,000 ?

If the car is pretty much gutted out anyways I would wait till you get down to the 11-5 mark if such a thing happens...
An 8-point cage is a couple of few hundred dollars to the door and then $89 Harbor Freight welder LOL you're not going to need it certified tell your down to 10 seconds flat or lower.. they just look at it and make sure it's in there... Of course I'm not endorsing this as the safest way to go...
the car, whatever it may end up being, will have to show faster than a 11.5 before it gets a cage. Post 136