I have a 72 F-100 pick up.
On it, the steering box has a play adjustment (screw and lock nut). Also, there is a thick rubber/fiber coupler in the steering column to isolate vibration transferred to the steering wheel. The setup has stop pins, so in case the rubber thingy fails, you still have positive steering. However, if it has failed, you will get a lot of slop in the steering. Replacement rubber bits are still available.
King pin wear shows up as sloppy steering dodges when bumps are encountered, not on smooth roads though. Tie rod ends should, of course be replaced if any play is present in them. This type of wear affects wheel alignment and behavior of steering under irregular road conditions or lateral weight shift, it is not steering wheel slop specific.
Cheers,