It's a simple solution for sure.
A person could hook the switch on one of the holes in the bottom of the dash frame and the spring wire end up high on the pedal arm (less travel up higher) and throw amount for the switch could be adjusted by moving it up or down the arm.
Dave is basically saying to do the same thing, just in a different way physically.
And you would want the switch to connect at the bottom of the pedal travel and not before the clutch would be disengaged, so a micro or other type switch that works directly off the pedal arm would be a lot harder to set up.
Probably a lot more temperamental about any changes in the linkages also.
