Ford vs Chevy Build-up

[SSGT Mustang]

I think the brace is a necessity for the convertible, and you could make the case with any rational tech inspector that it needs to be there. You would have to get the car off the ground and probably use a jack and piece of pipe to push out the towers a bit to get the brace to fit. Once installed, the towers shouldn't move inward any more or at least not as much.