10" drum 2.5" shoes on a 65 valiant??

Its a stock 1965 273 automatic wagon.........Power steering,Radio and heater options only. Not even a sway bar damnit. So What should the brake set up be? Is it correct with the 10 inch drum with 2 inch shoes that are currently on the rear. Or should it be the 10" drum with 2 1/2 inch shoes????........Im still unsure on the front as I couldnt get those off yesterday and will work on those tomorrow after replacing rear with correct set up.........Once I can confirm what it should be