I have a recently restored 67 427 roadster.Unfortunately the previous owner replaced the factory side exhaust with stainless under chassis exhaust. The rear valance was also changed to out-of-the-back. I want to re- install side exhaust. This car is a beautiful driver so I am not sure I want to torture myself looking for NOS parts. I will sell the no milage exhaust and valance I have but need guidance on purchasing new side exhaust. I have heard the 2 1/2 inch side pipes are barely adequate for the higher hp 427s. Is any particular manufacturer of replacement side exhaust better than the others. Should I buy a whole kit or piecemeal from different sources. What about the back panel. Look on ebay for original valance needing paint, or just buy a repro? Have any of you out there been through this process?