10" brakes on formula S cars?

I have the build sheet for my car. 1965 Barracuda non-S car, suspension package w/sway bar, 273 4bbl, 4 speed, power brakes, 9 inch drums.
Could be but all the information I saw made no mention of V8's coming with 9" brakes. Show us some factory information if it is possible. We are still discussing the possibilities. I looked at 66 because that's what I have maybe there was a change between 65 and 66.