The outside door handles are all the same 1961/66 F100/1100 Uni or not: C3TZ-8122404-B right / C3TZ-8122404-B left.

1963/64 only: Custom Cabs used an additional chrome bezel around the door handles...with one restriction.

The bezel said Custom Cab on it in script. The letters were painted black: C3TZ-8120966-A right / C3TZ-8120967-A left.
One restriction: According to the parts catalog...when the these bezels are present, side mouldings weren't used.

With side mouldings are present, there's a separate Custom Cab nameplate on the doors: C1TZ-8125622-A right/left.

Custom Cab or Regular Cab: The side mouldings were an option. They were not standard equipment on Custom Cabs.