1967 barracuda fastback resto or mod?

Much easier and less expensive to keep and fix it in stock form than to cut it up for go fast goodies, BUT go fast mods are cool.
I am going to do a little more investigation I will also send some more pics of the chassis and fender tag as well as some of the things I have done so far. and sure I will be asking for more input. as far as a build sheet any suggestions ? where to look? thanks again for all the help. larry