^^^safety is number one especially when it's your daughter! And if you're taking it to the track exclusively for drag racing then I roll cage at any speed would be under heavy considerations... Sandwiching the fish plates is just as strong as welding 1 plate to the top or probably stronger...
remember when you put the roll bar in there you're going to want to take some weight out because those things are heavy. Maybe consider taking the headliner out and all the heavy seat stuff, carpet and other stuff and putting them in the rafters in the garage... I did. And when I found out that it was too expensive and I wasn't enjoying the car and a half cut the cage back out and put everything back in and started to de-tune the motor a little bit to make it more comfortable for the street along with more comfortable gears...
