some pointers on chassis stiffening - http://www.sn65.com/Chassis%20Design%20101.htm
got the link from the other side - http://forums.vintage-mustang.com/vintage-mustang-forum/606021-65-fastback-shell-build.html
got the link from the other side - http://forums.vintage-mustang.com/vintage-mustang-forum/606021-65-fastback-shell-build.html