We went to disc brakes and changed to electric over hydraulic, mainly due to the size of the trailer.
1957 was the last year for single axle Overlanders.
Changed out the original axle to a Dexter 5200lb (beam axle, not a torsion axle), kodiak 12" disc brake conversion and an actuator and brake controller from Tuson RV brakes. My F150 is old enough it doesn't have a built in controller. I like the Tuson unit because it plugs into the OBD port and reads the truck's braking and matches the trailer to it. It also allows me to get a temperature readout on the transmission.