There are many conversions out there with no additional bracing. However, there are some that I've noticed seemed to help on mine. I've got the IPD lower control arm braces, and the upper GT-type firewall-to-strut braces. If you're serious about hard launches - it will help to brace the upper torque arm and lower control arm mounting points on the chassis - and to install poly bushings. And I think the car's stiffness would be helped with some bracing that structurally connects the rear lower control arm mounting points with the back of the front sub-frames. But that will have to be custom fabbed.