If the existing faucets havent been a freeze problem in 20 years why replace them?
basically every fall you with regular faucets you must turn them off at shutoff inside, open outsde valve, and disconnect hose/.
with the freeze proof you must still disconnect hose if any....
so you save little:(
Are your faucets leaking or something?
I have a friend who wanted new outside faucets since the existing ones leaked, at the handle.... the stem is the proper term.......
I grapped pliars, tightened the packing nut a quarter turn and she thought I was a miracle worker:)
They had leaked for 7 years and her hubby is clueless.....
I used one of those faucets recently, no leak.
perhaps you can save a lot of work?