Got a factory strut brace off a 97 Cobra to put on my 98 GT ragtop. As I don't have the strut tower drilled with the bolts welded in like earlier cars, and my firewall doesn't have the lip that the brace bolts to, I have two choices. Drill holes in the original factory brace and make it work with my 98, or get an aftermarket brace and save the factory original. How rare/desirable are the factory braces? Would I be stupid to hack it up to fit my 98? Should I sell it and buy an aftermarket brace?