Hey Mark,
It looks like the thread recommended by Kurt should supply the answer to your question, at least in part. As far as the wheel size for coupes, you may want to call Dave Murray at the Shelby American Collection in Boulder. He has maintained an original coupe,289's, and 427's for years. They have a web page with the phone number. Call on Saturdays. If you are not able to get in touch with Dave for some reason, let me know and I'll ask Chic Ford. He used to own CSX-**** (289 Comp) and other 289 street cars along with CSX- **** (427 SC I think).
Let me know if I can help.
steve
