I did all this work because I didn't have a way to bend the .125 plate and the one I did do, my floor pan disappeared when I pulled the trigger on the welder gun lol
Luckily mines a California car so the pans are good, but still pretty thin to support a roll bar. I figure since the whole pan is basically the same thickness my seat will bust through the floor at the same time the bar does if I put it on its lid!