[rotorwrench]

F1 would be 1948 through 1952 1/2 ton pickups.

Ford used the light switch on the steering box through 1939 but my concern would be the length of the steering shaft in question. If too long then the switch tube won't work as is. The end of the gearbox where the bearing cap goes on also may be different. I'd be curious about Randy Gross' F100 conversion. You might try to contact him or maybe someone that has his conversion will add information.