'65 Formula S always have 10" inch drums on front or some had 9"?

I had 65 273/235 4bbl car that had everything but the in dash tach and the S badges from the factory and it had 10's,heavy springs,2 1/4 in exhaust the cut out in the rear valance for the resonator sway bar and a 4 speed This was in the mid 1980's