I have a 68 convertible with no "X" brace under it. The way the exhaust is routed it looks like it will have to be replaced to install the brace. I have never driven it with a brace under it and don't have any idea how much difference it makes. Am I taking a big chance driving it without the brace or have other people gotten away with never installing one. I was also thinking about putting subframe connectors under it. I would rather do one or the other. Am I better off replacing the exhaust and putting the "X" brace under it or are subframe connectors good enough. Any information is appreciated.