I've only ever seen the 2 position ones on the 6 cyl foot start trucks, I'd be willing to bet all the originals had only on/off positions, no 'acc' or'lock', that started with the V8's and solenoid starters, which is the switch that's available repro

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics