The "Bullnose" steering wheels was introduced for the 1978 model of F-series, Bronco.
That same molded steering wheel was used in a lot of cars in the early 1970's as well as the Econoline van, in a variety of different colors.
The horn pad looks like it belongs in a late 80's Econoline. Probably E7UZ-13A805-A, which replaced D9TZ-13A805-A.
The "Dentside" steering wheel was introduced for the 1971 model of F-series and lasted until the 77 model year.
Truck: 1981 F-150 Explorer / Engine: 300-6 California MCU Feedback System / Trans: T-18 - 4 speed / 2.75 Ford Rear Axle Open Diff.