Did you know... that in 1963, the Thunderbird used a hydraulic variable speed windshield wiper motor, powered by the power steering pump?

The one downside is you can't turn them on to clear the screen when you parked up and the motor isn't running.

that's probably why the power steering reservoir looks like it holds a couple quarts, vs a cup or two for most other power steering pump reservoirs I'm used to on old Mopars

http://vintagethunderbirdclub.net/phpBB3/viewtopic.php?t=6764
https://rpmcanada.ca/1963-thunderbird-survivor-is-a-family-heirloom/